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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: SClassical on September 10, 2010, 03:03:23 AM

Title: Sound Devices USBPre 2
Post by: SClassical on September 10, 2010, 03:03:23 AM


http://www.sounddevices.com/products/usbpre2.htm

Title: Re: Sound Devices USBPre 2
Post by: sunjan on September 10, 2010, 04:44:48 AM
Can someone watch this can tell me if it is the same as the MixPre but with extra features like digital out etc...?

So it can be used as a preamp/AD for a PCM-D50?

http://www.sounddevices.com/products/usbpre2.htm

If you read the link that you just posted, yes, in theory at least. Compared to the Mixpre there are other non-vital differences though (2 vs. 3 XLR inputs with ability to mix down etc.)

"Stand-Alone Operation

The USBPre 2 can be used in Stand-Alone mode where it operates as a high-quality, portable microphone preamplifier and analog-to-digital converter. Digital signals connected to the USBPre 2 are converted to analog and available at the headphone, XLR, and RCA outputs. Stand-Alone operation requires the unit to be connected to a USB power source. Stand-Alone mode is a great option when an additional microphone preamplifer, A-D converter, or D-A converter is required."

You'd just have to pick up an external USB battery like Tekkeon. Remains to be seen how much running time you'd get if you want P48.

This is actually pretty exciting news. The original USBpre didn't support standalone use, IIRC.
The only weird thing as I see it, is the inclusion of toslink digital jacks, but no coax?!

This narrows down the use with field recorders with 24bit and optical input to almost none.
D50 is pretty much the only one I know with the right specs. Note that the D50 is known to be very fickle about the optical signal it's being fed. It's not compatible with UA-5 (use the search for the full story), and it remains to be seen if it actually plays nicely with USBpre 2.
Then there is the H120 and the JB3, but they're 16bit and getting antiquated...

Another interesting question is wether it supports analog pass-through, or if the signal goes through A/D/A conversion?

No MSRP posted yet.
It's being presented at the IBC this week. If anyone happens to be in Amsterdam, go there and quiz the SD crew:
http://www.sounddevices.com/news/usbpre-2

(http://www.sounddevices.com/images/products/usbpre-2-back-350px.jpg)
(http://www.sounddevices.com/images/products/usbpre-2-inputs-250px.jpg)
(http://www.sounddevices.com/images/products/usbpre2-425px.jpg)

Frequency Response (reference 1 kHz, at 96 kHz Sample Rate)
10 Hz - 40 kHz, ± 0.5 dB (any input to PC recording)
10 Hz - 40 kHz, ± 0.5 dB (PC source to AUX output)

THD+N (22 Hz - 22 kHz measurement bandwidth)
0.05% max (any input to PC recording, gain control at min, input driven to -6 dB FS)
0.009% max (AUX output, 0 dB V output, 100 ohm load)
0.05% max (HEADPHONES output, 2 V rms output, 600 ohm load)

E.I.N. (MIC inputs)
-127 dBu min (22 Hz - 22 kHz bandwidth, 150 ohm source, gain control fully clockwise, 15 dB pad out)

Input Clipping Level (1% THD)
Mic: -10 dBu
Mic (15 dB pad): +4 dBu
Line: +28 dBu (19.45 V rms)
Aux: +9 dBu (2.18 V rms)

Input Sensitivity (typical, for 0 dB FS)
Mic: -9 dBu min, -60 dBu max
Mic (15 dB pad): +6 dBu min, -58 dBu max
Line: +29 dBu min, +10 dBu max
Aux: +12 dBu min, -7 dBu max.

Input Impedance (actual)
Mic: 4k ohm, active-balanced
Mic (15 dB pad): 4k ohm, active-balanced
Line: 60k ohm, active-balanced
Aux: 80k ohm, active-balanced

Input Limiter Threshold
Mic: -4 dBFS

Low Cut
Mic: 80 Hz, -3 dB, 12 dB per octave

Output Clipping Level (1% THD, PC-controlled output levels at max)
Balanced XLR: +18 dBu with 100k ohm load
Aux: +8 dBu (2.0 V rms) with 100k ohm load
Headphones: +11 dBu (2.75 V rms) with 600 ohm load

Output Impedance
Balanced XLR (Line level): 500 ohms
Balanced XLR (Mic level): 5 ohms
Aux: 2k ohms

S/PDIF Digital
24 or 16 bit input

A/D Converter
24-bit resolution. 114 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)

D/A Converter
24-bit resolution. 112 dB typical dynamic range (22 Hz - 22 kHz bandwidth, A-weighted)

Sample Rates / Bit Depths
Recording: 8, 16, or 24-bit at 8, 16, 32, 44.1, 48, 96, or 192 kHz
Playback: 24-bit at 8, 16, 32, 44.1, 48, 96, or 192 kHz

Master Clock
Crystal based, low jitter

Metering
48 segments, 44 dB total range, peak ballistics. 0 dB on meter = 0 dB FS (0 dB referenced to full scale digital)

Phantom Power
48 V through 6.8k ohm resistors. Each mic input will supply 10 mA

Powering
USB bus powered, soft-start meets USB hot-plugging power requirements (5 V, 100 mA max current drawn during enumeration)
5 V, 500 mA max current from USB port (USBPre 2 will not function if connected through a passive USB connection or hub)

Dimensions (unpackaged)
4.3 cm x 18 cm x 10 cm (H x W x D)
1.7 in. x 7.25 in. x 4.25 in. (H x W x D)

Weight
0.5 kg
1.13 lbs.

Certifications
Meets FCC Part 15 Class B
Complies with the Requirements of European Directive 89/336/EEC
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 10, 2010, 05:29:57 AM
The description from the website states:

To interconnect with sound systems big and small, the USBPre 2 includes numerous output connection types, including balanced mic- or line-level on XLR, unbalanced consumer line-level on RCA, S/PDIF coaxial (RCA) and optical (Toslink).

The photo doesn't show the S/PDF coaxial (RCA) out -  but the manual shows it:

http://www.sounddevices.com/download/guides/USBPre2_en.pdf

You can also use it with the Microtrack II

It's 0.5kg (Mixpre is 1.2kg)..Less than half the weight of a mixpre and also have digital optical/coaxial out.

Also it looks as if it runs on 5V USB power. Very interesting.
Title: Re: Sound Devices USBPre 2
Post by: flipp on September 10, 2010, 06:03:57 AM

http://www.sounddevices.com/products/usbpre2.htm



from the link above: "We apologize for the boom-induced noise present in the audio. It was a result of the microphone being spring clamped to the cabled boom due to a forgotten shock mount...and too much coffee."

Nice to know the professionals f*ck-up on occasion.   :D




Looks interesting. Anybody heard a rumor on street price yet?
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 10, 2010, 06:11:29 AM
Now I wonder if it's possible to put 2 of them together and make a 4 track preamp/mixer...That will be lighter than the 2 track mixpre (with digital out!).
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 10, 2010, 09:25:51 AM
Oh my.

This could potentially replace my SD MP-2 and M-Audio Firewire Audiophile.
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 10, 2010, 09:38:36 AM
Looks nice!  Isn't a TS member running one of these aready?? 
Title: Re: Sound Devices USBPre 2
Post by: audBall on September 10, 2010, 10:11:37 AM
Nice.  I wonder how the D/A (and headphone out) is on the unit.  It'd be great to have the taping rig double as your digital playback setup as well. 

From the manual:
Sample rates below 32 Khz are not supported on the digital connections. The optical connections do not support the 192 Khz sampling rate. If signal is present at both the optical and coaxial input, the signal from the optical input will take precedence.
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 10, 2010, 10:40:33 AM
Anyone else find it odd that the XLR inputs and outputs are upside down? Maybe it's just me but I can't recall a piece of gear with XLR's oriented like that.

Looks nice!  Isn't a TS member running one of these aready?? 

Says it's available Oct. 2010. If there is someone running one of these already please step forward! I've got questions!
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 10, 2010, 10:53:46 AM
I must be thinking of the 1st version.  With the toslink out this might work well with my D50  >:D 

Anyone else find it odd that the XLR inputs and outputs are upside down? Maybe it's just me but I can't recall a piece of gear with XLR's oriented like that.

Looks nice!  Isn't a TS member running one of these aready?? 

Says it's available Oct. 2010. If there is someone running one of these already please step forward! I've got questions!
Title: Re: Sound Devices USBPre 2
Post by: flipp on September 10, 2010, 02:37:49 PM
Anyone else find it odd that the XLR inputs and outputs are upside down? Maybe it's just me but I can't recall a piece of gear with XLR's oriented like that.

Looks nice!  Isn't a TS member running one of these aready?? 

Says it's available Oct. 2010. If there is someone running one of these already please step forward! I've got questions!



The Fostex FR2's mic inputs are "upside down" but the AES/EBU in/out are the "normal" orientation.
http://www.fostexinternational.com/docs/products/FR-2.shtml#2
Title: Re: Sound Devices USBPre 2
Post by: yug du nord on September 10, 2010, 03:42:08 PM
You guys should check into the power situation for this.  I think that I recall that it NEEDS to be connected to a computer USB.  And that it can not be used as a stand alone preamp.  I might be wrong on that, but that's what comes to mind for me.

edit:  to scratch out false info.
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 10, 2010, 04:06:53 PM
You guys should check into the power situation for this.  I think that I recall that it NEEDS to be connected to a computer USB.  And that it can not be used as a stand alone preamp.  I might be wrong on that, but that's what comes to mind for me.

That is correct for the original USBPre.

This USBPre 2 explicitly states that it can be used in Standalone Mode.
Title: Re: Sound Devices USBPre 2
Post by: yug du nord on September 10, 2010, 04:34:07 PM
^^^Oops...  my bad.  I didn't realize there was a "2" model......  that makes things a bit more interesting!
Title: Re: Sound Devices USBPre 2
Post by: audBall on September 10, 2010, 05:06:08 PM
This USBPre 2 explicitly states that it can be used in Standalone Mode.

While that is correct, the Standalone section states, explicitly that:
Stand-Alone operation requires the unit to be connected to a USB power source.

So, do people plan on using an external battery with a USB (5V) connection?  Maybe I'm missing something here.
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 10, 2010, 07:04:52 PM
I wonder what the price will be  ???
Title: Re: Sound Devices USBPre 2
Post by: coloartist on September 10, 2010, 08:02:42 PM
I wonder what the price will be  ???

*  MAP
***AVAILABLE OCTOBER 2010***
USBPre 2 Audio Interface for Mac OS and Windows.
SKU:   SOU USBPRE2
Weight   1.30 lbs
Price:    US$649.95

http://www.trewaudio.com/store/product.php?productid=1110 (http://www.trewaudio.com/store/product.php?productid=1110)
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 10, 2010, 08:28:50 PM
Thanks

I wonder what the price will be  ???

*  MAP
***AVAILABLE OCTOBER 2010***
USBPre 2 Audio Interface for Mac OS and Windows.
SKU:   SOU USBPRE2
Weight   1.30 lbs
Price:    US$649.95

http://www.trewaudio.com/store/product.php?productid=1110 (http://www.trewaudio.com/store/product.php?productid=1110)
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 10, 2010, 10:00:06 PM
SD website states it's 1.13 lb not 1.3 lb

Its cheaper and lighter than the mixpre with digital out and more detailed metering too.
Still hope you can join 2 of these together.

Reading this looks as if it uses not only the same preamp as the 7 series recorders but also uses the same A/D converters as them!! So I guess if you run this with an MT your recording will be the same as running a 7 series recorder but a cheaper and lighter option.

http://broadcastengineering.com/products/sound-devices-intros-usbpre2-ibc-20100912/


Thanks

I wonder what the price will be  ???

*  MAP
***AVAILABLE OCTOBER 2010***
USBPre 2 Audio Interface for Mac OS and Windows.
SKU:   SOU USBPRE2
Weight   1.30 lbs
Price:    US$649.95

http://www.trewaudio.com/store/product.php?productid=1110 (http://www.trewaudio.com/store/product.php?productid=1110)
Title: Re: Sound Devices USBPre 2
Post by: sunjan on September 11, 2010, 05:53:14 AM
SD website states it's 1.13 lb not 1.3 lb
---
if you run this with an MT your recording will be the same as running a 7 series recorder but a cheaper and lighter option.
Don't forget you still need to factor in the Tekkeon USB battery. And external powering to the MT depending on the condition of the internal battery.

Looks like there are retailers taking pre-orders for $549:
http://www.pro-sound.com/BrandSound/SSOUUSBPRE2.html

Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 11, 2010, 06:11:14 AM
Yeah...I know Church Audio does a really stealthy 5V external battery for recorders

http://cgi.ebay.com/MICROPHONE-BATTERY-BOX-STEALTH-R09-LS-10-MICROTRACK-MD-/250648957070?pt=LH_DefaultDomain_2&hash=item3a5bd7908e

Title: Re: Sound Devices USBPre 2
Post by: OOK on September 11, 2010, 09:45:44 AM
The description from the website states:

To interconnect with sound systems big and small, the USBPre 2 includes numerous output connection types, including balanced mic- or line-level on XLR, unbalanced consumer line-level on RCA, S/PDIF coaxial (RCA) and optical (Toslink).

The photo doesn't show the S/PDF coaxial (RCA) out -  but the manual shows it:

http://www.sounddevices.com/download/guides/USBPre2_en.pdf

You can also use it with the Microtrack II

It's 0.5kg (Mixpre is 1.2kg)..Less than half the weight of a mixpre and also have digital optical/coaxial out.

Also it looks as if it runs on 5V USB power. Very interesting.

There is the one picture not posted....its the side with the usb...you will clearly see the coax....I tried to attach it but it won't, you have to go to the website to see it............its there....  OOK

Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 11, 2010, 11:19:04 AM
Yeah...I know Church Audio does a really stealthy 5V external battery for recorders

http://cgi.ebay.com/MICROPHONE-BATTERY-BOX-STEALTH-R09-LS-10-MICROTRACK-MD-/250648957070?pt=LH_DefaultDomain_2&hash=item3a5bd7908e

I don't think that's it. Looks like a standard 9v battery box for mics.


There is the one picture not posted....its the side with the usb...you will clearly see the coax....I tried to attach it but it won't, you have to go to the website to see it............its there....  OOK

I scratched my head trying to figure out what you were talking about for a minute....then I realized you have to click on the pic of the USB jack to see that side. D'oh!
Title: Re: Sound Devices USBPre 2
Post by: DigiGal on September 11, 2010, 12:51:25 PM
The description from the website states:

To interconnect with sound systems big and small, the USBPre 2 includes numerous output connection types, including balanced mic- or line-level on XLR, unbalanced consumer line-level on RCA, S/PDIF coaxial (RCA) and optical (Toslink).

The photo doesn't show the S/PDF coaxial (RCA) out -  but the manual shows it:

http://www.sounddevices.com/download/guides/USBPre2_en.pdf

You can also use it with the Microtrack II

It's 0.5kg (Mixpre is 1.2kg)..Less than half the weight of a mixpre and also have digital optical/coaxial out.

Also it looks as if it runs on 5V USB power. Very interesting.

There is the one picture not posted....its the side with the usb...you will clearly see the coax....I tried to attach it but it won't, you have to go to the website to see it............its there....  OOK



I found another photo showing the SPDIF I/O and was able to attach it, looking good. . .

(http://www.sounddevices.com/images/products/usbpre2-right-800px.jpg)
Title: Re: Sound Devices USBPre 2
Post by: OOK on September 11, 2010, 01:08:11 PM
This may be the pre the mt2 has been waiting for, half the price of a V3.   Looks like it wll be a nice pre for the R9hr and PCM-10's of the world as well.  However you still can't beat the little boxes for value. 

I love how technology marches on and offers the tapers new and better products..

ook
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 11, 2010, 01:38:10 PM
I am thinking more the Sony D50!  I was never to impressed with my MT II

This may be the pre the mt2 has been waiting for, half the price of a V3.   Looks like it wll be a nice pre for the R9hr and PCM-10's of the world as well.  However you still can't beat the little boxes for value. 

I love how technology marches on and offers the tapers new and better products..

ook
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 11, 2010, 02:48:25 PM
What is the smallest/lightest USB power supply people are using for the MTII for stealthing?
Title: Re: Sound Devices USBPre 2
Post by: spyder9 on September 13, 2010, 02:02:08 AM
Stand alone mode.  New metering.   Nice job SD!
Title: Re: Sound Devices USBPre 2
Post by: sunjan on September 13, 2010, 05:34:36 AM
What is the smallest/lightest USB power supply people are using for the MTII for stealthing?

Haven't tried any of these. Depending on your needs, go for the bigger models that have been used more by the community.

Generic 4xAA battery bay, fill it with your own NiHM cells, from $4 + cost of batteries: http://www.batteryspace.com/batteryholderaax4withusbinterfaceconnectorandbeltcliponoffpowerswitch-rohscompliant.aspx
Lenmar PPUMINI, 650mAh, $6: http://www.dadadeals.com/products/Lenmar-PPUMINI%252dP-PowerPort-Mini-Anywhere-Universal-Charger-%28Pink%29.html
Macally JBOXMINI, 1100mAh, $11: http://www.provantage.com/macally-jboxmini~7MGMA06T.htm
Macally JBOX (IP-A481), 3400mAh, $17: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170494701024
Lenmar Powerport (PPU2100B), 2400mAh, $21: http://www.iunitek.com/iunitek/index.cfm?fuseaction=shop.dspSpecs&part=2245603
Or the whole range of Tekkeon offerings:
Tekkeon MP1800, 4000mAh, $28: http://www.ecost.com/detail.aspx?edp=41290606&source=EWBBASE&cm_mmc=CSE-_-google-_-ewbbase-_-Office&CAWELAID=367057023
Tekkeon 3450i, 11,600mAh at 5V, $94: http://www.ecost.com/detail.aspx?edp=37696890&source=EWBBASE&cm_mmc=CSE-_-google-_-ewbbase-_-Systems&CAWELAID=367038526

By the look of it, the Macally Jbox on Ebay is a nice deal at the moment!
Title: Re: Sound Devices USBPre 2
Post by: NOLAfishwater on September 13, 2010, 01:31:59 PM
this will also be a really nice option for 680 owners that are looking for a small pre for channel 7-8
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 13, 2010, 05:42:41 PM
So I got ahold of SD and ask a few questions.  Really about the AD>DA and looking to lock it to an external clock source.

i Kirk,

I got some answers from the head engineer.

By default, the outputs of the USBPre 2 only carry signal from the computer. There is a DIP switch that configures the USBPre 2 to send whatever signal is going to headphones to the outputs. This is how the USBPre 2 can be used as a preamp / converter in Stand-alone mode. When this option is engaged and the Monitor Mix knob is turned all the way to "PRE", the signal path from analog inputs to analog outputs is fully analog. So good thing I asked!

The USBPre 2 will lock its sample rate to that of incoming digital signal, regardless of what sample rate the USBPre 2 itself is set to (Via DIP switches in Stand-alone mode or via software in Interface mode). It does not do any sample rate conversion.


So no it will not accept an external spdif clock and allow mic input.  But the is no resample on the analog outputs.  Louie is right I'm all over this for a digi input to my 680
Title: Re: Sound Devices USBPre 2
Post by: SmokinJoe on September 13, 2010, 11:41:51 PM
If these catch on, I predict the standard power supply will be a home-made (or Gak-industries) 7805 voltage regulator boxes and DVD batteries.  It's cheaper and longer lasting than those boutique USB batteries.
5400 ma-hr / 500 ma = 10+ hours.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 14, 2010, 12:40:15 AM
Well I went and ordered one.  And FYI the price of $549 is 100 less than SD authorizes dealers selling them for.  It does say sponsored but I was warned that they might not a fully licensed dealer.  For $100 I'm willing to risk it.  Don't have an ETA yet.   Anybody wanna buy an Apogee AD-1000 ;D
Title: Re: Sound Devices USBPre 2
Post by: sunjan on September 14, 2010, 03:20:03 AM
The USBPre 2 will lock its sample rate to that of incoming digital signal, regardless of what sample rate the USBPre 2 itself is set to (Via DIP switches in Stand-alone mode or via software in Interface mode). It does not do any sample rate conversion.

Hey Kirk, thanks a lot for getting in touch with SD.
Could you shoot them another question?

I'd love a confirmation that the optical out signal is compatible with Sony D50, ie that there is a 24bit flag embedded in the PCM stream. Read about the issues in this thread:
http://taperssection.com/index.php?topic=95964.msg1671535#msg1671535

Quote
Its the fault of the device in front of the PCM 50 which is not sending the correct flag for 24 bit. PCM 50 will fall back to 16 when this flag is not embedded in the  PCM Stream. ... The Grace Design V3 has this corrected in the newer firmware
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 14, 2010, 06:04:25 AM
I would imagine it passes the correct flag!  I know that Grace fixed this issue with the V3.  I can't imagine that SD would put out a producet without the most current specs.  I know the UA-5 had this problem, but it is old technology and a discontinued product. 

The USBPre 2 will lock its sample rate to that of incoming digital signal, regardless of what sample rate the USBPre 2 itself is set to (Via DIP switches in Stand-alone mode or via software in Interface mode). It does not do any sample rate conversion.

Hey Kirk, thanks a lot for getting in touch with SD.
Could you shoot them another question?

I'd love a confirmation that the optical out signal is compatible with Sony D50, ie that there is a 24bit flag embedded in the PCM stream. Read about the issues in this thread:
http://taperssection.com/index.php?topic=95964.msg1671535#msg1671535

Quote
Its the fault of the device in front of the PCM 50 which is not sending the correct flag for 24 bit. PCM 50 will fall back to 16 when this flag is not embedded in the  PCM Stream. ... The Grace Design V3 has this corrected in the newer firmware
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 14, 2010, 08:45:10 AM
Any ideas on how you are going to power it?

Well I went and ordered one.  And FYI the price of $549 is 100 less than SD authorizes dealers selling them for.  It does say sponsored but I was warned that they might not a fully licensed dealer.  For $100 I'm willing to risk it.  Don't have an ETA yet.   Anybody wanna buy an Apogee AD-1000 ;D
Title: Re: Sound Devices USBPre 2
Post by: Todd R on September 14, 2010, 10:40:31 AM
I would imagine it passes the correct flag!  I know that Grace fixed this issue with the V3.  I can't imagine that SD would put out a producet without the most current specs.  I know the UA-5 had this problem, but it is old technology and a discontinued product. 


Yep, that's my thought as well.  The V3 and UA-5 were designed before the relevant 24bit spdif spec was finalized, so they didn't meet its requirements.  The D50 isn't finicky per se about its incoming optical signal, it just requires it meets the current spdif standard.  I'd imagine that SD would design a new product to comply with a standard that is now several years old, and the D50 would work fine with it.

Between being a good digital front end for my D50 and being a good digital front end for the digi channels of my 680, this new SD box really has me thinking.  :hmmm:
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 14, 2010, 10:53:50 AM
I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.
Title: Re: Sound Devices USBPre 2
Post by: jbell on September 14, 2010, 10:57:30 AM
661 but nothing else in the hand held price range

I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.
Title: Re: Sound Devices USBPre 2
Post by: mterry on September 14, 2010, 11:29:01 AM
I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.

I ran the original USBPre for a few years and I loved it. It's built like a tank and a breeze to use. Let me know if you scoop one up!
Title: Re: Sound Devices USBPre 2
Post by: rastasean on September 14, 2010, 05:49:35 PM
I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.

http://www.sonosax.ch/recorders/minir82/minir82_index.html
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 14, 2010, 07:26:36 PM
I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.

http://www.sonosax.ch/recorders/minir82/minir82_index.html

D'oh! Let's be reasonable here, lol.  :P

I should have added the *affordable* tag to my question also. But you're right that does fit the bill.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 14, 2010, 08:13:00 PM
The USBPre 2 will lock its sample rate to that of incoming digital signal, regardless of what sample rate the USBPre 2 itself is set to (Via DIP switches in Stand-alone mode or via software in Interface mode). It does not do any sample rate conversion.

Hey Kirk, thanks a lot for getting in touch with SD.
Could you shoot them another question?

I'd love a confirmation that the optical out signal is compatible with Sony D50, ie that there is a 24bit flag embedded in the PCM stream. Read about the issues in this thread:
http://taperssection.com/index.php?topic=95964.msg1671535#msg1671535

Quote
Its the fault of the device in front of the PCM 50 which is not sending the correct flag for 24 bit. PCM 50 will fall back to 16 when this flag is not embedded in the  PCM Stream. ... The Grace Design V3 has this corrected in the newer firmware

Outa town till Sat
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 14, 2010, 10:31:39 PM
I think if you have that you wont need a $650 external preamp/AD you can just run mic-in with that thing.

I know this is the wrong thread to ask this question but since it is pertinent...The only small recorders I can think of that can take advantage of the 24/96 digital signal are the D50 and the Microtrack. Is that it? I think I'm gonna get the USBPre 2 if I can find something else other than those 2 recorders.

http://www.sonosax.ch/recorders/minir82/minir82_index.html

D'oh! Let's be reasonable here, lol.  :P

I should have added the *affordable* tag to my question also. But you're right that does fit the bill.
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 15, 2010, 05:19:08 PM
Actually, I also went and ordered one and they called me back saying the actual price is $649.99 so they say they'll charge my credit card $649.99. You should call them cuz they will actually charge you 100 more. If you ordered online they will charge your card STRAIGHT away and you have to wait for a month. So you can cancel your order if you want.

I contacted SD about the preamp and AD if it was the same as the 7 series recorder and they replied to me as follows:

"The A/D converter in the USBPre 2 is the exact same part we use in the 7-Series recorders. The converter is really a stage after the preamplifier. The preamplifier itself is very similar to the 7-Series, but with modifications to accommodate for different powering requirements."

They used the favorable AD converter (which we all love) from the 7 series recorder. I'm curious if the preamp will sound better than the 7 series recorder as a standalone.

I also asked them if it was possible to link 2 or more together they replied:

"The USBPre 2, like the original USBPre, has 2 inputs and 2 outputs. There is no method for inserting signal into the stereo bus besides using the main inputs. So linking multiple units is not possible. It is definitely possible to hook up multiple units to a single computer, however most applications are only able to address one device for input and one device for playback, so it would not allow the use of more than 2 inputs even if more than one USBPre 2 were connected. It would be possible to use more than one USBPre 2 as a signal converter for more than 2 channels. So if 3 USBPre 2 units were powered, you would have 6 analog (mic/line) or digital inputs that could be output balanced analog, unbalanced analog, coaxial S/PDIF, and optical TOSLINK."



Well I went and ordered one.  And FYI the price of $549 is 100 less than SD authorizes dealers selling them for.  It does say sponsored but I was warned that they might not a fully licensed dealer.  For $100 I'm willing to risk it.  Don't have an ETA yet.   Anybody wanna buy an Apogee AD-1000 ;D
Title: Re: Sound Devices USBPre 2
Post by: Todd R on September 15, 2010, 05:46:59 PM
Thanks for all the feedback.

Odd, PSS who originally has it on their website at $550, now has it at $600.  If the $550 was a mistake and they're going to be charging the MAP of $649, why change the website to $600?  I'm still kicking around the idea of getting one, but if anyone is serious about it, I guess they should call.  Maybe they'd honor a $600 price.

$550 seemed to be the going street rate for the earlier USBPre 1.5, so that might be why they originally had up that price for the new USBPre 2.
Title: Re: Sound Devices USBPre 2
Post by: notlance on September 15, 2010, 08:15:46 PM
Perhaps the USBPre 2 is so new that the street price has not been established.

I find it interesting that PSS is not listed as a reseller on the Sound Devices site.  PSS other prices for SD gear seem to be in line with every other dealer out there.  SD seems to keep a tight rein on their street prices.  When I bought my 702 a couple of years ago, I bought it from a dealer that was offering a 11% site wide discount.  I did not think they'd discount SD gear, but they accepted my order with the discount.  I thought for sure they'd call to tell me they could not give me the discount.  Well, they shipped the box (actually it was dropped shipped from the factory) at the discounted price.  The next week I check the reseller's web site and they were no longer selling SD gear.  I don't know if there is a connection, but I just sayin'.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 16, 2010, 04:28:32 AM
UPDATE on PSS pricing. They will NOT honor the $549 price or the $600 price that was mentioned.  The price would be $650 just kie anyone else.   Isider info says they recieved a cease and desist order from SD today.  The order I placed for $550 is being refunded.  Screw them, I'll do business with Adam at Full Compass, a straight shooter.  I went round and round on the phone with owner there and he got mad at me for trying to buy it at the originally advertised price, then tried to refund my money back via paypal the way I paid.  He got pissed when I point out that that type of refund would cost me 3% so now I have the check is in the mail crap to deal with.  The guy accused me of trying to take advantage of him because he put up a price that was wrong, like that was my fault.
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on September 16, 2010, 09:51:13 AM
UPDATE on PSS pricing. They will NOT honor the $549 price or the $600 price that was mentioned.  The price would be $650 just kie anyone else.   Isider info says they recieved a cease and desist order from SD today.  The order I placed for $550 is being refunded.  Screw them, I'll do business with Adam at Full Compass, a straight shooter.  I went round and round on the phone with owner there and he got mad at me for trying to buy it at the originally advertised price, then tried to refund my money back via paypal the way I paid.  He got pissed when I point out that that type of refund would cost me 3% so now I have the check is in the mail crap to deal with.  The guy accused me of trying to take advantage of him because he put up a price that was wrong, like that was my fault.

And yet they still have it listed for $599. That guy sounds like a nut-job. Cease and sesist!
Title: Re: Sound Devices USBPre 2
Post by: datbrad on September 16, 2010, 01:08:13 PM

"The A/D converter in the USBPre 2 is the exact same part we use in the 7-Series recorders. The converter is really a stage after the preamplifier. The preamplifier itself is very similar to the 7-Series, but with modifications to accommodate for different powering requirements."


I am guessing from everything I have read that the preamps are the same as the ones used in the 702/722/744T.

It's too bad they are not using the ones in the 788T, as those sound much better to my ears.

Essentially, the USBPre 2 will allow someone to put together a less expensive version of a 702 for just over a $1000 including powering and a small bit bucket. It should sound exactly the same as a 702.

I think Sound Devices missed an opportunity not using the 788T preamps, but you can't have it all.

Great looking piece of gear.

Can't wait to see one in the field.........

Title: Re: Sound Devices USBPre 2
Post by: OOK on September 16, 2010, 06:45:08 PM

"The A/D converter in the USBPre 2 is the exact same part we use in the 7-Series recorders. The converter is really a stage after the preamplifier. The preamplifier itself is very similar to the 7-Series, but with modifications to accommodate for different powering requirements."


I am guessing from everything I have read that the preamps are the same as the ones used in the 702/722/744T.

It's too bad they are not using the ones in the 788T, as those sound much better to my ears.

Essentially, the USBPre 2 will allow someone to put together a less expensive version of a 702 for just over a $1000 including powering and a small bit bucket. It should sound exactly the same as a 702.

I think Sound Devices missed an opportunity not using the 788T preamps, but you can't have it all.

Great looking piece of gear.

Can't wait to see one in the field.........

Gotta agree here....702/722/744 owners would have purchased it to upgrade their peamps.....it would have been a win win.....  This will serve however to drop the value of the 702/722/744's.  why buy one when for 1k you could have this and a bit bucket.... oh well still love my 702 for its form factor...... and ease of use.....

OOK
Title: Re: Sound Devices USBPre 2
Post by: SClassical on September 16, 2010, 07:01:43 PM
They actually didn't say the preamp will be worse than the 7 series recorder..just different. Maybe it will be better for some applications..but the AD is the same. If folks like the V3 preamp and was planning to purchase/run it with the 7 series recorder..it will be a cheaper option to purchase/run it with the USBPre2/MTII. I plan to do a comp with V3/722 vs USBPre2 one day.
Title: Re: Sound Devices USBPre 2
Post by: mterry on September 16, 2010, 07:59:09 PM
Love the V2 right now, but can't wait to test a USBPre 2 > (Warm) 661. Don't really care about it too much for play back. However, I know how easy a USBPre is to use and it's built like a tank and has good depth.............hmmmmmmmmmm
Title: Re: Sound Devices USBPre 2
Post by: braweave on September 17, 2010, 05:04:27 PM
Is there any more word about when the big dealers will start selling this and the actual release date?
Title: Re: Sound Devices USBPre 2
Post by: rastasean on September 18, 2010, 07:56:26 PM
*dumb question alert*

if you have a recorder and a microphone that can do mid/side, do you also need a pre-amp to process mid/side prior to going to the recorder?

thanks.
Title: Re: Sound Devices USBPre 2
Post by: OOK on September 18, 2010, 08:48:25 PM
*dumb question alert*

if you have a recorder and a microphone that can do mid/side, do you also need a pre-amp to process mid/side prior to going to the recorder?

thanks.

nope...........its actually better to record it raw....meaning card to one channel and fig8 in the other and use your favorite mastering program to do the mixing....  this way you can dial in the wide of the sound field....

peace ook
Title: Re: Sound Devices USBPre 2
Post by: braweave on September 19, 2010, 05:39:14 PM
is there any word if you can use the RCA outputs and the Coax out at the same time??

Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 20, 2010, 01:47:55 PM
So more information directly from Sound Devices regarding retailers. 

First, take a look at our list of resellers here:

   http://www.sounddevices.com/resellers/

These companies have a direct relationship with Sound Devices and when
the USBPre 2 begins shipping in October, they will have it available. If
they are not on this list, they are not a Sound Devices reseller (this
list is kept up-to-date).

We are aware of scammers who sell product at well-below market price to
lure customers. Based on your message below, that may be what is going
on here. I am confident the resellers on our list don't do this
behavior. If I were you, I would demand a full refund. You don't mention
who the company is, nor does it matter, but the fact that they won't
refund your money is an indicator that something funny may be going on.
If you suspect illegal activity, I would contact the Better Business
Bureau or attorney general and report their activity.

We have yet to begin shipping the USBPre 2. When we do, I recommend
purchasing from a company on our reseller list to be certain that they
can indeed fulfill the order.

Jon Tatooles
Managing Director
Sound Devices, LLC

And I am now awaiting word about my refund.  I'll let y'all know how things shake out but if I were you I'd call Adam at Full Compass please tell him Kirk sent you.  If you want to contact me via PM I can tell you more, Kirk
Title: Re: Sound Devices USBPre 2
Post by: NicStage on September 20, 2010, 04:42:19 PM
I also asked them if it was possible to link 2 or more together they replied:

"The USBPre 2, like the original USBPre, has 2 inputs and 2 outputs. There is no method for inserting signal into the stereo bus besides using the main inputs. So linking multiple units is not possible. It is definitely possible to hook up multiple units to a single computer, however most applications are only able to address one device for input and one device for playback, so it would not allow the use of more than 2 inputs even if more than one USBPre 2 were connected. It would be possible to use more than one USBPre 2 as a signal converter for more than 2 channels. So if 3 USBPre 2 units were powered, you would have 6 analog (mic/line) or digital inputs that could be output balanced analog, unbalanced analog, coaxial S/PDIF, and optical TOSLINK."
One thing I would add to this (That's yours truly in the blue text there) is that Mac OS X has a function called Aggregate Audio (http://www.apple.com/pro/techniques/aggregateaudio/). This allows you to essentially combine all the inputs and outputs available on multiple sound cards that are connected to the computer into a single virtual device. Since the USBPre 2 complies with the USB Audio Class, it can take advantage of this feature. We haven't done extensive testing, but initial tests of aggregating multiple USBPre 2 interfaces on one Mac have had positive results. Of course it should be noted that to work around clocking issues, the aggregate function in OS X re-samples audio. Just thought I'd throw that out there. :)
Title: Re: Sound Devices USBPre 2
Post by: su6oxone on September 20, 2010, 06:21:04 PM
One thing I would add to this (That's yours truly in the blue text there) is that Mac OS X has a function called Aggregate Audio (http://www.apple.com/pro/techniques/aggregateaudio/). This allows you to essentially combine all the inputs and outputs available on multiple sound cards that are connected to the computer into a single virtual device. Since the USBPre 2 complies with the USB Audio Class, it can take advantage of this feature. We haven't done extensive testing, but initial tests of aggregating multiple USBPre 2 interfaces on one Mac have had positive results. Of course it should be noted that to work around clocking issues, the aggregate function in OS X re-samples audio. Just thought I'd throw that out there. :)

Great to see SD post here!  Now how about an upgraded 744 with four pre's instead of two...  :P
Title: Re: Sound Devices USBPre 2
Post by: yug du nord on September 20, 2010, 07:38:05 PM
^It's only his second post......  let's not run him out of town with our "dream machine" ideas yet.   ;)
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 20, 2010, 08:57:32 PM
So just an FYI, in  my opinion you'd be foolish to purchase this unit from Prosound.  They did not answer my emails regarding a refund after they told me that they would not honor their original price of $549.  The owner first said he would mail a check and then called back to tell me that what he read here on Taperssection makes him think I am out to rip him off and was hesitant to mail a check. I tried to get in touch via e-mail where there is a paper trail but I got nothing.  So now we go the paypal way to get my money back.  Shady stuff to be sure.  Like they say, if it looks too good to be true it probably is. 
Title: Re: Sound Devices USBPre 2
Post by: tracker on September 20, 2010, 10:34:32 PM
lol, riiight,.... you sent HIM money for something he said he could deliver, error or not, and you're the one that's out to rip him off?!

classic!

anyway, back to the usbpre2,.... i'm surprised that we havent heard from any beta-testers yet.

asio4all does on PC what aggregate device does on Mac,.... no idea how well it performs though.

Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 21, 2010, 11:08:03 AM
Nic from SD has been great about getting the off the books info all us tech nerds want.  He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.  But don't bury him with every single idea all at once.   It's great that a company is not only willing to answer questions but listens to our ideas! 

As for powering the unit, I plan on making a cable that has the voltage regulator(mentioned previously) inline so that it will operate off the same 9V dvd batteries I use now.  Would be really cool if somehow SD made it able to accept 9V on the USB bus.  As for the difference in preamps between the 744 and the 788 is there really that big of a difference?  Maybe some of the folks running those could chime in, but I think we all agree that there is nothing wrong with the 744 style preamp.  And for me it just is such a perfect fit matched with the Tascam 680.  Especially the size making it so easy to pack.
Title: Re: Sound Devices USBPre 2
Post by: NicStage on September 21, 2010, 12:09:49 PM
Since it is also able to operate as a interface on the computer, the powering requirements are going to be identical. Specifically: 5V +/- 10%, 500mA max draw. So it will need a regulated 5 Volts on standard USB wiring from a power supply that can give it 500 mA at any given time. I've actually gleaned a lot of information about powering solutions from this thread. A lot of our customers are in the film and television field and they are used to powering solutions like 14V NP-1 batteries, 7V L-Series batteries, etc. and they are inquiring a lot about how to power the USBPre 2 in the field for stand-alone use.

I wonder how the D/A (and headphone out) is on the unit.

There is a lot of headroom on the headphone output and it is very clean. It is fully capable of driving even some of the really high-impedance headphones to very high levels. It will feel familiar to anyone who has experience with the headphone amps in our other products.

Is there any more word about when the big dealers will start selling this and the actual release date?

Mid to late October is when retail stock should begin arriving to our resellers.

is there any word if you can use the RCA outputs and the Coax out at the same time??

The stereo signal from the internal bus is sent to all outputs simultaneously. You can send 2 channels out S/PDIF optical, 2 channels out S/PDIF coax, 2 channels out balanced XLR, 2 channels out unbalanced RCA, and 2 channels out both headphone outputs all at the same time.

Great to see SD post here!  Now how about an upgraded 744 with four pre's instead of two...  :P

That's a request I hear more than occasionally. I'll certainly pass it along.
Title: Re: Sound Devices USBPre 2
Post by: notlance on September 21, 2010, 03:58:53 PM
And for y'all that don't need all the features of the USBPre 2, it seems to me that I'm already seeing more USBPres on eBay.  It's like when the 552 came out a bunch of 442s appeared for sale.  It might be a good time to pick up the earlier version of the USBPre.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 21, 2010, 04:28:30 PM
I take it the USBpre cannot be powered without a computer at all....or we would have heard about it right?
Title: Re: Sound Devices USBPre 2
Post by: tracker on September 21, 2010, 07:58:52 PM
someone else noticed this,....

Nic is that a USB 3 port?
Title: Re: Sound Devices USBPre 2
Post by: sunjan on September 22, 2010, 03:11:31 AM
I take it the USBpre cannot be powered without a computer at all....or we would have heard about it right?
You're right. WEll technically you can feed it with power, but it relies on the data communication with the computer, preventing standalone use.

Still a neat rig if you pair a legacy USBpre with a small netbook.
Title: Re: Sound Devices USBPre 2
Post by: NicStage on September 22, 2010, 10:21:56 AM
You guys are right on regarding the original USBPre: It needs to be connected to a computer with properly installed drivers in order for its firmware to boot up. The only signal path through the original USBPre that didn't go through the computer was out to the headphones, so it doesn't have any practical stand-alone functionality. While definitely a much older design (It was one of the first USB powered interfaces that also supplied phantom power) the quality of the preamps is still what you would expect from Sound Devices products.

The USBPre 2 is compatible with USB 1.1 and USB 2.0 specifications. We use the physical USB 3.0 connector because we found it to be a more robust connector that will be stronger than the original connector. USB 3.0 wouldn't provide a benefit for the USBPre 2, since it's only pushing 4 channels of audio at most (2 in, 2 out).
Title: Re: Sound Devices USBPre 2
Post by: NOLAfishwater on September 26, 2010, 10:22:17 PM
So just an FYI, in  my opinion you'd be foolish to purchase this unit from Prosound.  They did not answer my emails regarding a refund after they told me that they would not honor their original price of $549.  The owner first said he would mail a check and then called back to tell me that what he read here on Taperssection makes him think I am out to rip him off and was hesitant to mail a check. I tried to get in touch via e-mail where there is a paper trail but I got nothing.  So now we go the paypal way to get my money back.  Shady stuff to be sure.  Like they say, if it looks too good to be true it probably is.

I have had lots of positive transactions with ProSound. They are one of the nations leaders in location sound sales. I can tell you that whatever happened was probably miscommunication from Sound Devices. The sales manager is a taper and is a stand up guy.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on September 27, 2010, 01:21:09 PM
So just an FYI, in  my opinion you'd be foolish to purchase this unit from Prosound.  They did not answer my emails regarding a refund after they told me that they would not honor their original price of $549.  The owner first said he would mail a check and then called back to tell me that what he read here on Taperssection makes him think I am out to rip him off and was hesitant to mail a check. I tried to get in touch via e-mail where there is a paper trail but I got nothing.  So now we go the paypal way to get my money back.  Shady stuff to be sure.  Like they say, if it looks too good to be true it probably is.

I have had lots of positive transactions with ProSound. They are one of the nations leaders in location sound sales. I can tell you that whatever happened was probably miscommunication from Sound Devices. The sales manager is a taper and is a stand up guy.

Thanks for your input Louie, but my own experience was awfully bad.  Sound Devices had absolutely NOTHING to do with the problems that arose.  Maybe there was a pricing error or maybe there wasn't who knows?  When it came time to get my money back to me the owner choose not to do what he originally said he was going to do in order to ensure I got a complete refund.  Instead, I had to file a claim with Paypal to get my money refunded to me.    It was the manner in which it was handled, the accusations that were put forth and their lack of response to my e-mails that are at the root of the issues.  Not whether the price was right or wrong from the manufacturer.  Long story short, I'd never do business with them or recommend them at this point.  FWIW, it was the owner, or at least someone who identified himself as the owner and not the sales manager you speak of.   I never spoke with the sales manager.  I've got my order in at Full Compass with Adam and will be expecting delivery as soon as they hit the stores.   
Title: Re: Sound Devices USBPre 2
Post by: NicStage on October 19, 2010, 12:10:25 PM
He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.

This feature has been included for release. Mostly due to discussions here and some feedback from other users as well. :)

Here's the updated user guide: http://sounddevices.com/download/guides/USBPre2_en.pdf

Title: Re: Sound Devices USBPre 2
Post by: yug du nord on October 19, 2010, 12:25:42 PM
He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.

This feature has been included for release. Mostly due to discussions here and some feedback from other users as well. :)

Here's the updated user guide: http://sounddevices.com/download/guides/USBPre2_en.pdf

Very cool!!! 
Both the fact that it accepts an ext. clock....  and the fact that hands-on research finds it's way onto the deck. 
With the exception of football.....  Wisconsin folk are pretty reasonable eh??   ;)
Title: Re: Sound Devices USBPre 2
Post by: tracker on October 19, 2010, 08:30:40 PM
oh that's very very nice ;D

any news on a release date?
Title: Re: Sound Devices USBPre 2
Post by: NicStage on October 20, 2010, 11:17:53 AM
oh that's very very nice ;D

any news on a release date?

Imminent. They should be shipping any day now.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 20, 2010, 05:10:12 PM
He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.

This feature has been included for release. Mostly due to discussions here and some feedback from other users as well. :)

Here's the updated user guide: http://sounddevices.com/download/guides/USBPre2_en.pdf

WOW!  That is awesome.  Thanks a lot for listening Nic.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 20, 2010, 05:24:32 PM

He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.

This feature has been included for release. Mostly due to discussions here and some feedback from other users as well. :)

Here's the updated user guide: http://sounddevices.com/download/guides/USBPre2_en.pdf

Nic am I reading the manual correctly that the unit can only be locked to an external signal when used with a computer?  IN other words, if I was using two different decks in the field( say two R-44's and want to use the USBpre-2 to sync the clocks that I could not do it in standalone mode?
Title: Re: Sound Devices USBPre 2
Post by: NicStage on October 20, 2010, 05:38:00 PM
Nic am I reading the manual correctly that the unit can only be locked to an external signal when used with a computer?  IN other words, if I was using two different decks in the field( say two R-44's and want to use the USBpre-2 to sync the clocks that I could not do it in standalone mode?

The information in that section referring to computer settings is just stating what is required for sample rate locking when the USBPre 2 is in interface mode. The USBPre 2 will lock to the sample rate of incoming digital signal automatically when in stand-alone mode.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 20, 2010, 10:17:35 PM
Nic, just to be sure that I am being clear....bear with me....the example I'm using is trying to get two decks synced so that there are no drift issues with the clocks.  But I still want the USBPre2 to accept a microphone input.  What I am trying to accomplish is getting the unit to lock onto another clocking signal, while being used as a mic preamp.  Not just to lock onto the digital input from another deck and output that.  So for instance, I'll use the Edirol R-44 for the example.  This is a four channel deckthat can accept spdif in on channel 3 & 4.  And deck that is able to output a digital spdif signal.  So deck 1 has two channels of analog input and two channels of digital spdif input from USBPre2-#1.  Then deck 2 has two channels of analog input and two channels of digital Spdif signal from USBPre2-#2.  Can I take the spdif input from R-44 #1 and input it into USBPre2-#2 as a clocking only signal while still using it as a standalone mic preamp?

Does that make sense?  Thanks in advance...thanks a lot, Kirk
Title: Re: Sound Devices USBPre 2
Post by: NicStage on October 21, 2010, 12:06:57 PM
Nic, just to be sure that I am being clear....bear with me....the example I'm using is trying to get two decks synced so that there are no drift issues with the clocks.  But I still want the USBPre2 to accept a microphone input.  What I am trying to accomplish is getting the unit to lock onto another clocking signal, while being used as a mic preamp.  Not just to lock onto the digital input from another deck and output that.  So for instance, I'll use the Edirol R-44 for the example.  This is a four channel deckthat can accept spdif in on channel 3 & 4.  And deck that is able to output a digital spdif signal.  So deck 1 has two channels of analog input and two channels of digital spdif input from USBPre2-#1.  Then deck 2 has two channels of analog input and two channels of digital Spdif signal from USBPre2-#2.  Can I take the spdif input from R-44 #1 and input it into USBPre2-#2 as a clocking only signal while still using it as a standalone mic preamp?

Yes, you can do this. The input source LED's (that show what input source is selected currently) will work as normal, but when a SPDIF input signal is present, the SPDIF input source LED's will illuminate in addition to the active input source. So if you have an active SPDIF signal coming in and you have both input sources set to mic, both mic input source LED's and both SPDIF input source LED's will be illuminated:

(http://farm2.static.flickr.com/1208/5102498076_ef39f6106f_o.jpg)

In this same setup, if you switch an input source to SPDIF, it will be indicated by SPDIF being the only input source LED illuminated for that input. Here I switched input 1's source to SPDIF:

(http://farm2.static.flickr.com/1116/5101904059_8f6cf743a3_o.jpg)

This USBPre 2 was in stand-alone mode when I took these shots. The behavior would be identical if it were in interface mode (i.e. connected to a computer as a sound card). The only difference when in interface mode is that the sample rate in the control panel of the computer's OS would need to be set to the same sample rate as the digital signal coming into the USBPre.
Title: Re: Sound Devices USBPre 2
Post by: su6oxone on October 21, 2010, 12:11:28 PM
Nic, thanks for your input in this forum.  Please come back frequently (  :P ), your input/participation is highly valued and appreciated.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 21, 2010, 01:24:05 PM
Nic, thanks for taking the time to not only explain but post pictures for (me) us.  And I agree, your input and you feedback here are great.  It's a tangible selling point for me that a manufacturer is not just responding but implementing ideas garnered from the discussions.   You set the bar pretty high for other people who would follow your lead.  I cannot wait to get delivery of the pre. 

So gang, while I was originally going to use a voltage regulator on one of my 9V dvd batteries, I am thinking of going another direction.  Mostly because I am looking for a 12V source for my Apogee AD1K.  I leaning towards the battery on flea bay that has 5v, 9V, &12V outputs.  There's been some ok feedback from buyers.   I still might make a 5V step down too since the parts are so cheap.  How are you guys figuring on powering the unit in the field?
Title: Re: Sound Devices USBPre 2
Post by: rastasean on October 21, 2010, 03:07:47 PM
Nic, thanks for your input in this forum.  Please come back frequently (  :P ), your input/participation is highly valued and appreciated.

x3

I think I know what I want for my birthday!
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on October 21, 2010, 11:31:23 PM
I'll use the Edirol R-44 for the example.  This is a four channel deckthat can accept spdif in on channel 3 & 4. 


????

When I run digital-in to my R44 from a V3, it appears as channel 1 & 2 only.  I don't see a way to switch the digital in to 3/4.

Jeff
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on October 22, 2010, 05:52:55 AM
I would personally go for a 12v cell arrangement with a step down to 5V.

In this way, you have tons of headroom current- it would run for "days", you have an overhigh source voltage-rail to step down separately for powering all sorts of other gear and also you are utilising a worldwide vehicle-standard voltage which might assist with powering in ardous situations...

Depends on your intended use- I carry my gear and rarely put it down but I wouldn't mind the weight because of the advantages.

JimP
Title: Re: Sound Devices USBPre 2
Post by: rastasean on October 22, 2010, 03:01:30 PM
I would be happy if it could just use a 7.2v RC battery.
Title: Re: Sound Devices USBPre 2
Post by: SClassical on October 22, 2010, 09:14:19 PM
Cheap and compact way to power this thing in the field:

http://cgi.ebay.com/4-X-AA-Battery-Holder-Box-1PCS-5V-DC-USB-OUTPUT-NEW-/150509987935?pt=LH_DefaultDomain_0&hash=item230b18285f#ht_2085wt_1139

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320518833585&ssPageName=STRK:MEWAX:IT#ht_1972wt_976
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 22, 2010, 10:13:33 PM
I'll use the Edirol R-44 for the example.  This is a four channel deckthat can accept spdif in on channel 3 & 4. 


????

When I run digital-in to my R44 from a V3, it appears as channel 1 & 2 only.  I don't see a way to switch the digital in to 3/4.

Jeff

It was an example not a verbatim quote.  Just substitute 3&4 for 1 & 2 and you get the idea.  The point is now with a USBPre2 you could sync two R-44 so that there are no drift issues.  How cool is that ;D

As for the power step down, I have two things driving my ideas.  1. I need 12 volts for an Apogee AD-1000.  2. I already own 3 DVD batteries.  So stepping it down from 18 volts ( two dvd batteries in series) is most economical way to go.  In fact I have completed that set up, I'll post pictures.    Stepping down a single DVD battery to 5 volts, again, most economical since I don't have to purchase batteries.  I am in the middle of building that item now.  I will post pictures of that when it's done.    If I were to buy a battery I would buy the battery I linked to which would provide both 12 volt AND 5 volt satisfying both of my needs.  If I were to build from scratch, I can see the benefits of stepping down from 12 volts for longer life, but then the regulator will need to be able to dissipate more heat and would require heat sinks of some sort.  Right now the converter I envision will allow for the 9 volt dvd battery ( already own) to be used and power both the 5 volt units and the units I am already powering at 9 volts.  It will have hot swap capabilities and I will probably include a polarity switch since I may use an Edirol unit which would require a center pin negative.   I am trying to not buy more batteries if I can avoid it and know enough to be able to build a voltage regulator.  Here are Pictures of the one for the Apogee.A little hard to see since I heat shrinked thinks to keep them in place and to prevent shorts.  I had to cut down the strain relief to allow room for the voltage regulator to fit inside the XLR housing, so I used some clear shrink wrap to secure it in place........
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 23, 2010, 12:59:43 AM
USB POWER!   Finished.  Takes power from 9 volt DVD battery.  Steps it down from 9 volts to 5 volts on the USB plug.  Has pass thru 9 volts.  This set up would allow me to power my MP-2 and the USBPre2 at the same time.  For this one I decided to forgo a polarity switch and the hot swap.  Mostly because I don't really need them.  The SD preamps don't draw a lot of power and I expect to get over 5 hour run times with both units on a single battery.   I already have a battery cord for Edirol units and I have a hot swap set up for my 680. 

Considering I had extra battery cable parts and I happen to have a few of them fancy gold strain reliefs too, my cash outlay was pretty low.  Probably about $12-15, plus my time.  To build it completely from scratch including cable you could probably do it for under $30.  It could also be done with plugs so that you could just stick it inline of your normal battery setup but the plugs run around $3 or $4 each.  There is still lots of room it you wanted to get fancy and includ on/off switch or polarity switch.  You could even put an led to show it's working if you wanted. 

First picture is finished and installed, A quick DOH! moment as I realized I miswired the pass thru.  Luckly an easy fix.  A look of the unit with CORRECT pass thru.  Then some hot glue to secure everything.  And the finished product. 
Title: Re: Sound Devices USBPre 2
Post by: hammerhorror on October 23, 2010, 11:27:31 AM
I'm currently using a Tekkeon MP3450 battery to power my Tascam DR-680. http://www.tekkeon.com/downloads/dtasht_MP3450.pdf (http://www.tekkeon.com/downloads/dtasht_MP3450.pdf)

The Tekkeon MP3450 has DC output, plus an additional 5V USB power output. I can set the DC output to 12V to power my DR-680, and then use the 5V USB output to power the Sound Devices USBPre2. Both outputs are active at all times.

To me this seems like the easiest/best/all in one powering solution for using the USBPre2 with whatever recorder you are currently using. You can power both devices with one battery!
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 23, 2010, 02:54:44 PM
Yeah those Tekkon batteries are badass mofo's for sure.   There is a similar type of set=up being sold on e-bay for around half what they set you back, granted it is a honk kong item.  Since I already owned a stack of dvd batteries I wanted to be able to use them.  Plus I like making my own stuff when I can, My total outlay was small for this.   

I wish these USBPre2's would ship....I'm itching to play with the new toy. 
Title: Re: Sound Devices USBPre 2
Post by: sunjan on October 23, 2010, 06:48:52 PM
Cheap and compact way to power this thing in the field:

http://cgi.ebay.com/4-X-AA-Battery-Holder-Box-1PCS-5V-DC-USB-OUTPUT-NEW-/150509987935?pt=LH_DefaultDomain_0&hash=item230b18285f#ht_2085wt_1139

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320518833585&ssPageName=STRK:MEWAX:IT#ht_1972wt_976

Neat with right angle, except that the cable should be mini-USB, but I get the point! Any of those available as right angle too?
Title: Re: Sound Devices USBPre 2
Post by: SClassical on October 23, 2010, 07:08:15 PM
It looks like USB type B not the mini one..
Title: Re: Sound Devices USBPre 2
Post by: Todd R on October 23, 2010, 07:25:40 PM
1. I need 12 volts for an Apogee AD-1000.  2. I already own 3 DVD batteries.  So stepping it down from 18 volts ( two dvd batteries in series) is most economical way to go.  In fact I have completed that set up, I'll post pictures.   

I don't think you'll be able to get this to work, but I'm curious if you can.  I don't know anyone who has successfully put 2 DVD batteries in series to get 18v.  Probably possible I'm sure, but not with a simple cable it seems.  Something about the protection circuit used with those li-ion DVD batteries does not allow them to be put in series and work.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 24, 2010, 03:03:10 PM
Todd, I plugged in all in and it is delivering 11.9 volts at the xlr-4 connector.   So it sure appears to be working.  I have not plugged it into the deck yet I'll do that today.
Title: Re: Sound Devices USBPre 2
Post by: Todd R on October 24, 2010, 10:04:50 PM
Thanks for the report back kirk, good to know it's working.  Not sure what you've done though -- I thought you said you were just tying together 2x 9v DVD batteries to get 18v.  As I recall, several people tried that before and couldn't get it to work. ???

Looking more closely at the pics of your cable though, it looks like you've got a voltage regulator buried in there (to get to 12v I guess).  Maybe it is this configuration that is making it work for you when it failed for others?

BTW, if that is what you've done, and are dropping 18v down to 12v for use with the Apogee, I'd be a bit worried about heat dissipation.  I think the AD1000 draws something like 1.2 Amps, and you're dropping 6v.  That's 7.2 Watts of power that needs to be dissipated as heat.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on October 24, 2010, 10:12:24 PM
this machine provides 80 dB of gain when using mic in!! thats more than the 744 and the mixpre.  :o
Title: Re: Sound Devices USBPre 2
Post by: page on October 24, 2010, 10:43:57 PM
this machine provides 80 dB of gain when using mic in!! thats more than the 744 and the mixpre.  :o

and more then the 788 (manual says 76db).

it a typo?
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on October 25, 2010, 05:28:46 AM
probably not!

That's technology for you!

it's all relative to the noise floor though- at a quoted -127bBu that's some peformance...!
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 25, 2010, 10:51:10 AM
Thanks for the report back kirk, good to know it's working.  Not sure what you've done though -- I thought you said you were just tying together 2x 9v DVD batteries to get 18v.  As I recall, several people tried that before and couldn't get it to work. ???

Looking more closely at the pics of your cable though, it looks like you've got a voltage regulator buried in there (to get to 12v I guess).  Maybe it is this configuration that is making it work for you when it failed for others?

BTW, if that is what you've done, and are dropping 18v down to 12v for use with the Apogee, I'd be a bit worried about heat dissipation.  I think the AD1000 draws something like 1.2 Amps, and you're dropping 6v.  That's 7.2 Watts of power that needs to be dissipated as heat.

True about the voltage regulator and I am using the XLR housing as the heat sink.  The top part of the voltage regulator lays against the housing when assembled.  Or at least that is my plan.  Since that assenbly is seperated from the unit by the break out cable, I think it will work fine.  And the additional xlr4 housing will give even more surface area.  I'll give it a trail run today.  Then a field test at Mule the end of the week. 

Same deal with the USB power setup.  I attached a stack of washers to the dissipate the heat and there is a metal plate that installs fist in the project box before the black lid.  I have the top of the heatsink contacting the metal plate in addition to the washer heat sink to get rid of the heat.  Good catch!  But I did take that into consideration. 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 25, 2010, 11:08:46 AM
AH, Todd you bring up a good point.  I have to use a different VR that supplies 1.5 amps not 1.0 amps.  Otrherwise it's good to go.  I guess having the VR in line makes the difference.
Title: Re: Sound Devices USBPre 2
Post by: page on October 25, 2010, 11:40:34 AM
probably not!

That's technology for you!

it's all relative to the noise floor though- at a quoted -127bBu that's some peformance...!

Well, then tentatively we have a discrepency; If they are the same pre-amps as the early 7 series boxes had, then I don't think you would get 80db (unless something has changed in which case the question turns to what else was affected?). So are they new (a 3rd generation different from the entre 7 series line) or is it a typo?
Title: Re: Sound Devices USBPre 2
Post by: vibrato on October 25, 2010, 05:48:01 PM
He even is passing on our suggestions, one of mine was have the unit able to accept external clocking.

This feature has been included for release. Mostly due to discussions here and some feedback from other users as well. :)

Here's the updated user guide: http://sounddevices.com/download/guides/USBPre2_en.pdf

Wow, impressive how SD is listening and implementing customer feedback!

Would this have any impact on the ability to use two of these with a Mac?  Specifically would you be able to avoid the Resample function when trying to aggregate them in Core Audio?
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on October 26, 2010, 04:14:38 AM
(just speccing up my next rig here!)

Could I use an FR2-LE with a USB pre 2 through USB connection?

Using the USB pre 2 as a front end for the Fostex, feeding it through USB...?

Probably more of a Fostex question than a Sound Devices question...
Title: Re: Sound Devices USBPre 2
Post by: SClassical on October 26, 2010, 04:37:44 AM
probably not!

That's technology for you!

it's all relative to the noise floor though- at a quoted -127bBu that's some peformance...!

Well, then tentatively we have a discrepency; If they are the same pre-amps as the early 7 series boxes had, then I don't think you would get 80db (unless something has changed in which case the question turns to what else was affected?). So are they new (a 3rd generation different from the entre 7 series line) or is it a typo?

Actually when SD emailed me regarding the preamp and AD they only told me that they had to do something with the preamp in order to have it run at lower voltage. So the preamp is not exactly the same. They did state that the AD converter is the same as the 7 series recorders. So maybe that's the reason why the dynamic range of the AD @ 24-bit resolution is 114 dB (same as the 722 and the 702). They didn't say the preamp was better or worse - they just stated that they changed it slightly so they can run at a lower voltage.
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on October 26, 2010, 05:45:04 AM
that makes sense...
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 26, 2010, 04:30:24 PM
(just speccing up my next rig here!)

Could I use an FR2-LE with a USB pre 2 through USB connection?

Using the USB pre 2 as a front end for the Fostex, feeding it through USB...?

Probably more of a Fostex question than a Sound Devices question...

I'm not sure about the Fostex, but with Edirol and Tascam units, if they are in USB mode they read as a harddrive, not as a recorder.  All of their controls are locked out so recording is probably unlikely if it functions anything like those other units. 
Title: Re: Sound Devices USBPre 2
Post by: tracker on October 27, 2010, 01:01:36 AM
i think for running 2 units at once you'd still need to run it through an aggregator right?

otherwise how would the computer tell between 1&2 on A and 1&2 on B?

Title: Re: Sound Devices USBPre 2
Post by: dogmusic on October 27, 2010, 12:52:17 PM
Would the USBpre 2 run from an AC wall outlet with this type of adapter?

http://www.thinkgeek.com/gadgets/travelpower/9124/

Title: Re: Sound Devices USBPre 2
Post by: rastasean on October 27, 2010, 03:20:18 PM
well the current and voltage match what the usb2 requires so I think it would. any second opinions?
Title: Re: Sound Devices USBPre 2
Post by: SClassical on October 27, 2010, 06:33:41 PM
Yes it will work... It's like the MT adapters. The adapters are much cheaper than the 4pin adapters they use for their other preamp/recorders.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on October 27, 2010, 07:47:16 PM
Yes it will work... It's like the MT adapters. The adapters are much cheaper than the 4pin adapters they use for their other preamp/recorders.

Hi scyue,

I notice you record classical music. I'm putting together a setup to record acoustic grand piano in a semi-permanent situation (i.e., I don't really need a portable rig).

Would the mic pres in the USBPre 2 work well enough for that purpose? How would they compare to your more expensive units like the Grace and the Millenia?

I'd be going AKG 414's to a preamp with digital out and into the Sony D50 digital input.

Thanks,

Phillip
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on October 28, 2010, 05:31:38 AM
Hey Dogmusic-

I'm unfamiliar with the Grace and Millenia pre-amps you describe but can tell you that the Sound Devices stuff is industry-standard proprietary gathering hardware and that it will be up to the job, no problem...

JimP
Title: Re: Sound Devices USBPre 2
Post by: tracker on October 28, 2010, 08:05:56 AM
indeed, loads of people use SD for classical work, and the choice between say grace, millenia, dav or SD's pre's would be more down to personal taste rather than quality.
Title: Re: Sound Devices USBPre 2
Post by: Jamos on October 29, 2010, 02:46:56 PM
On Wednesday, I asked my local vendor to check about availability and this is what he told me:

"1st units shipping end of this month...New orders, ... Mid-November"

Anyone hear anything different?
Title: Re: Sound Devices USBPre 2
Post by: rastasean on October 29, 2010, 03:48:43 PM
well i guess it matters where you order from. Full compass is only an hour away from SD HQ so I figure they would be able to fill their backstock the quickest. I wouldn't be surprised in the release/ship date gets pushed back just a little by a week or so.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on October 29, 2010, 03:54:19 PM


As for the power step down, I have two things driving my ideas.  1. I need 12 volts for an Apogee AD-1000.  2. I already own 3 DVD batteries.  So stepping it down from 18 volts ( two dvd batteries in series) is most economical way to go.  In fact I have completed that set up, I'll post pictures.    Stepping down a single DVD battery to 5 volts, again, most economical since I don't have to purchase batteries.  I am in the middle of building that item now.  I will post pictures of that when it's done.    If I were to buy a battery I would buy the battery I linked to which would provide both 12 volt AND 5 volt satisfying both of my needs.  If I were to build from scratch, I can see the benefits of stepping down from 12 volts for longer life, but then the regulator will need to be able to dissipate more heat and would require heat sinks of some sort.  Right now the converter I envision will allow for the 9 volt dvd battery ( already own) to be used and power both the 5 volt units and the units I am already powering at 9 volts.  It will have hot swap capabilities and I will probably include a polarity switch since I may use an Edirol unit which would require a center pin negative.   I am trying to not buy more batteries if I can avoid it and know enough to be able to build a voltage regulator.  Here are Pictures of the one for the Apogee.A little hard to see since I heat shrinked thinks to keep them in place and to prevent shorts.  I had to cut down the strain relief to allow room for the voltage regulator to fit inside the XLR housing, so I used some clear shrink wrap to secure it in place........

UPDATE to adapter:  creating a new tread in remote power to keep this thread on topic:

http://taperssection.com/index.php?topic=140355.0
Title: Re: Sound Devices USBPre 2
Post by: SClassical on October 31, 2010, 03:33:10 AM
Yes it will work... It's like the MT adapters. The adapters are much cheaper than the 4pin adapters they use for their other preamp/recorders.

Hi scyue,

I notice you record classical music. I'm putting together a setup to record acoustic grand piano in a semi-permanent situation (i.e., I don't really need a portable rig).

Would the mic pres in the USBPre 2 work well enough for that purpose? How would they compare to your more expensive units like the Grace and the Millenia?

I'd be going AKG 414's to a preamp with digital out and into the Sony D50 digital input.

Thanks,

Phillip

Hi Phillip,
I think you will be fine with using USBPre2 because I sometimes use SD722 only without any external preamp. SD preamp is very good and I only use the external for serious work that is for distributing to a large audience. But for a straight forward job using the SD is good enough. One thing to remember is the preamp/AD is only a fraction of what makes your recording sound great. Your mics and how they are setup is just as important and also the venue's acoustics and how well the piano and pianist is can determine the overall outcome of a recording. But I think you will be fine. You might want to consider upgrading your mics in the future because AKG even though they are good usually people use a pair of matched DPA, Schoeps or Neumann omni mics. I know an engineer who uses AKG414 into a Apogee miniME all the time in his sessions..even though his recordings are okay the quality can never beat a DPA/Schoeps>Grace/Millennia>SD722 combo. Good luck and you should be fine for all your piano recordings.. FYI read (only) what Richard King (an award winning classical engineer for Sony Classical) say about recording classical piano:

http://mixguides.com/microphones/tips_and_techniques/audio_recording_piano_november_2/
 
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on October 31, 2010, 10:00:42 AM
Yes it will work... It's like the MT adapters. The adapters are much cheaper than the 4pin adapters they use for their other preamp/recorders.

Hi scyue,

I notice you record classical music. I'm putting together a setup to record acoustic grand piano in a semi-permanent situation (i.e., I don't really need a portable rig).

Would the mic pres in the USBPre 2 work well enough for that purpose? How would they compare to your more expensive units like the Grace and the Millenia?

I'd be going AKG 414's to a preamp with digital out and into the Sony D50 digital input.

Thanks,

Phillip

Hi Phillip,
I think you will be fine with using USBPre2 because I sometimes use SD722 only without any external preamp. SD preamp is very good and I only use the external for serious work that is for distributing to a large audience. But for a straight forward job using the SD is good enough. One thing to remember is the preamp/AD is only a fraction of what makes your recording sound great. Your mics and how they are setup is just as important and also the venue's acoustics and how well the piano and pianist is can determine the overall outcome of a recording. But I think you will be fine. You might want to consider upgrading your mics in the future because AKG even though they are good usually people use a pair of matched DPA, Schoeps or Neumann omni mics. I know an engineer who uses AKG414 into a Apogee miniME all the time in his sessions..even though his recordings are okay the quality can never beat a DPA/Schoeps>Grace/Millennia>SD722 combo. Good luck and you should be fine for all your piano recordings.. FYI read (only) what Richard King (an award winning classical engineer for Sony Classical) say about recording classical piano:

http://mixguides.com/microphones/tips_and_techniques/audio_recording_piano_november_2/

Hi scyue,

Thanks very much for that information. It tells me that for critical recordings, a Millenia preamp would be preferred, and that is what I needed to know. We always hope that we can find a less expensive piece of gear that will do the job of high end equipment.

I have read before that MIX article on recording piano and there is excellent advice from all the producer/engineers. One disagreement I have with Richard King is that he records the treble (high notes) of the piano on the left side of the stereo image, which I think is contrary to human psychology and experience --- and drives piano players nuts!

Thanks to tracker and JimP for your advice.

Best,

Phillip
Title: Re: Sound Devices USBPre 2
Post by: su6oxone on October 31, 2010, 12:38:28 PM
http://mixguides.com/microphones/tips_and_techniques/audio_recording_piano_november_2/ (http://mixguides.com/microphones/tips_and_techniques/audio_recording_piano_november_2/)

Cool article, especially like hearing from Jim Dickinson (father of Luther and Cody from NMAS, who died last year). 
Title: Re: Sound Devices USBPre 2
Post by: ghellquist on October 31, 2010, 03:34:03 PM
One disagreement I have with Richard King is that he records the treble (high notes) of the piano on the left side of the stereo image, which I think is contrary to human psychology and experience --- and drives piano players nuts!

Well, this is how the audience will hear a grand piano when it is played on a stage with open lid. Your choice might be different.

// Gunnar
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on October 31, 2010, 07:31:10 PM
One disagreement I have with Richard King is that he records the treble (high notes) of the piano on the left side of the stereo image, which I think is contrary to human psychology and experience --- and drives piano players nuts!

Well, this is how the audience will hear a grand piano when it is played on a stage with open lid. Your choice might be different.

// Gunnar

Even very close to the stage, and even in a chamber music setting, you are pretty much hearing in mono.

On the other hand, our ears tend to prefer higher frequency sounds on the right. Furthermore, given the number of people who listen to CD's who have had some experience of playing the piano, IMHO I think piano recordings made from the player's perspective are preferable.

Phillip
Title: Re: Sound Devices USBPre 2
Post by: ghellquist on November 01, 2010, 03:27:23 AM
On the other hand, our ears tend to prefer higher frequency sounds on the right.

Hmm? So it is all wrong in concert hall when the violins sit to the left and basses to the right?  Sorry I have to totally disagree with that statement. It would be one thing if you said that you as one person preferr it this way. In order to make a statement like that I believe you should have a statistically larger sample than 1.

But as very often, it is a question about taste, and we all have one but not necessarily the same.

To be clear, I respect your taste in this respect and by all means follow your own taste when recording, but I have a different taste and follow mine.

// Gunnar
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on November 01, 2010, 06:08:38 AM
I have rarely seen such diplomacy!!
Title: Re: Sound Devices USBPre 2
Post by: SClassical on November 01, 2010, 07:29:53 AM
Richard records CDs for the fan/audience listeners - the audience usually receive more treble on the left side. But if a CD was made for a pianist (only) there will be a situation where an engineer might position the mics behind the pianist. In this situation the left mics will be closer to the bass section of the piano. So it's really the producers/engineer/artists that determine how they will like to be sound. Most commercial CDs are made for the audience not for the pianist. Another thing you might realize when recording a grand piano is that the hammer/keyboard side of the piano sounds more boomy than the tail end the piano when you position the stereo pair about 6 feet away. So actually the sound from the right mics will sound a little more sparkle than the left mics.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on November 01, 2010, 09:51:08 AM
On the other hand, our ears tend to prefer higher frequency sounds on the right.

Hmm? So it is all wrong in concert hall when the violins sit to the left and basses to the right?  Sorry I have to totally disagree with that statement. It would be one thing if you said that you as one person preferr it this way. In order to make a statement like that I believe you should have a statistically larger sample than 1.

But as very often, it is a question about taste, and we all have one but not necessarily the same.

To be clear, I respect your taste in this respect and by all means follow your own taste when recording, but I have a different taste and follow mine.

// Gunnar
Hi Gunnar,

I won't blame you if you don't believe me, but I recently read that fact about human preference on the web somewhere. Of course I can't find it now,  and unfortunately I can't spend any more time this morning trying. If I come across the site, I'll PM you.

Your point was that the audience hears a piano with the treble on the left and the bass on the right. But for 90% of the audience at a piano recital, they are too far away to hear anything but mono. Even standing in the curve of the grand piano, you are hearing the full length of the bass strings. So you won't hear only the treble on the left. It will be a mix of bass and treble strings.

If a producer truly wants to record the way the audience hears, he/she should use a kunstkopf and make a binaural recording.

And then have two people on either side of the kunstkopf, fidgeting and coughing....
Title: Re: Sound Devices USBPre 2
Post by: vibrato on November 01, 2010, 04:21:19 PM
Back to topic - sort of  -

NicStage are you still checking out this thread?

Will external clocking improve the ability to use two of these with a Mac?  Specifically would you be able to avoid the Resample function when trying to aggregate them in Core Audio?  I guess I should contact SD directly...
Title: Re: Sound Devices USBPre 2
Post by: andromedanwarmachine on November 02, 2010, 06:16:47 AM
Hey vibrato...

what do you mean? would you link the two together digitally and then link one to the Mac through USB??
Title: Re: Sound Devices USBPre 2
Post by: vibrato on November 02, 2010, 02:02:13 PM
I was thinking of externally clocking two USBPre2 units so the samples would be in sync, and then using a USB port for each unit into the Mac and then use the Core Audio Aggregate function.  I'm trying to avoid the scary sounding resampling feature, although I don't even know if the resampling hurts the audio quality or reliability.
Title: Re: Sound Devices USBPre 2
Post by: duch on November 02, 2010, 02:10:21 PM
My guess is that the audio aggregate function will resample anyway and won't care if the clock are synced or not. This question is more related to Mac OSX than SD USBPre 2.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 02, 2010, 02:17:59 PM
I don't know the program but suspect that the resampling will be a function of the program not the SD units.  As for what "bad" things can happen, I don't really know but in a perfect world we are after a bit perfect signal chain. 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 02, 2010, 02:29:14 PM
Mine will be shipped TODAY!
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 02, 2010, 02:32:43 PM
Jerry Bruck called me yesterday to say he heard from SD that these have just started shipping, I should have mine Friday or next week.

I can't imagine anyone wanting to tape a piano from behind the pianist.  When I've had to sit in that location, the acoustic is unacceptable.  When a pianist conducts from the piano and has it turned so he can face the orchestra, with the keyboard out to the audience, the result is beyond dreadful, even with louvres over the soundboard to try to project the sound out.  I've never seen anyone try to mic a piano there. 

Jeff
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 02, 2010, 02:57:33 PM
Since someone else asked, I thought I'd also post it here.  I can get Zaolla Silverline cable for just above cost.  He inquired about a SPDIF cable for his new pre. 

 From their solid silver core Silverline cables....
part#:ZDRA-101.5 S/PDIF CABLE
Length:1.5FT 
MSRP: new price sheet on way.  Zaolla had a price increase imagine that.   

your cost: please PM includes shipping.  I would have to order it, Kirk

The same cable is $37 plus shipping at Pro audio Toys.  I can get any of the Zaolla cables just drop me a line if you need info.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 03, 2010, 11:23:59 AM
Finally chimming in on this one.  I want one!  Are there any distributors with stock on hand? 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 03, 2010, 12:34:45 PM
Finally chimming in on this one.  I want one!  Are there any distributors with stock on hand?

Talk to Adam @ Full Compass.  They took delivery yesterday.  I don't know if they have any units that are not spoken for.

Adam Grede
Sales Professiona
1-800-356-5844
adam@fullcompass.com
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 03, 2010, 03:19:08 PM
Finally chimming in on this one.  I want one!  Are there any distributors with stock on hand?

Talk to Adam @ Full Compass.  They took delivery yesterday.  I don't know if they have any units that are not spoken for.

Adam Grede
Sales Professiona
1-800-356-5844
adam@fullcompass.com

They had one on the shelf and I picked it up!   >:D     

Now onto powering and cable needs.
Title: Re: Sound Devices USBPre 2
Post by: dactylus on November 04, 2010, 07:35:38 AM
^
What is the price for one of these?

Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 04, 2010, 08:15:10 AM
^
What is the price for one of these?

$649.   I was in the market for an a/d and saw this as quite a deal.   Plus I'll have a very respectable  preamp as a backup.
Title: Re: Sound Devices USBPre 2
Post by: twatts (pants are so over-rated...) on November 05, 2010, 12:26:23 AM
I started thinking about power for this thing, since I intend to sell my left kidney for one later next year...

Foudn this:  http://www.ehow.com/facts_6371382_pin-configuration-usb-connectors_.html

Quote
Standard USB Pinout
•Looking at a standard A plug head on with pins up, the pins are numbered backwards from 4 to 1. Pin 4 is the -5 volt lead, pin 3 is the + polarity data pin, 2 is the - polarity data pin, and pin 1 is the +5 volt lead. Standard B plugs are a bit different due to shape. The plug is square, with bevels for the top corners. There are two pins on top, and two pins on bottom. The order is clockwise starting top left, 1 through 4. 1 is +5 volt lead, 2 is + polarity data, 3 is - polarity data, and 4 is -5 volt lead.

It is quite possible to make a 9 or 12vdc miniplug > adapter > 5vdc USB B plug...

Terry

Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 05, 2010, 11:09:51 AM
Terri,
  The problem with dropping voltage from 12v to 5v using a common voltage regulator will be heat.  See this thread: http://taperssection.com/index.php?topic=140355.0    Bleeding off that much voltage generates a tremendous amount of heat at the voltage regulator.  Dropping 6v made more heat at that little chip than I would have ever imagined to be possible.  Dropping from 9v to 5V should be more doable but there are still going to be heat issues.  A few pages back I posted pictures of the unit I built to do that exact thing.  As soon as the preamp arrives I'll be able to test it and give y'all results.  I do plan on beefing up the heat sink just to be on the safe side.  There are other ways to design the circuit. ( resistors, zener diodes )  maybe even other stuff I don't know about but I'm not an Electrical Engineer and can only design the basic stuff. 

USB wire color code:
Red 5v + pin1
Black 5v - pin4
Green data + pin3
White data - pin2

http://pinouts.ru/SerialPortsCables/usb_cable_pinout.shtml
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 05, 2010, 01:23:30 PM
I just got my USBPre 2 today. Cute little thing! I connected it to my XP Laptop and it used the Windows USB Plug & Play drivers. There are no drivers that come with the unit. That's strange. As I recall the standard Windows Plug and Play USB drivers are limited to 24 bit 48k sampling rate. And the drivers do not deliver Bit for Bit output. I have some 24/96 files and some 24/176 files that I play with Media Monkey through a ASIO driver, a RME sound card to a Benchmark DAC 1 using a AES/EBU connection. Fantastic sound. When I play them on the USBPre 2 the files are downsampled! I called Nic at Sound Devices and he confirmed that using a PC with XP, Vista and Win 7 that the standard USB driver will limit the RECORDING and PLAYBACK of the USBPre 2 to a maximum of 24 bit, 48k sample rate using the crap Windows Audio Control Panel! SD does not have any special ASIO drivers. I do not know anything about a MAC computer, this information is for a PC. Not being able to record and play files up to the advertised 24/192 on a PC is a big deal breaker for me and I am returning this unit. SD needs to put this information on their website and let their dealers know. I am not happy! I hope that there is an explanation and answer for this limitation.


Update: I just received a call from Bob Mondok from Sweetwater regarding the above problem.
He talked to an engineer at SD and was told that a ASIO driver is needed for High-Rez recording and playback.
Bob stated that SD may have a ASIO solution next week. So stay tuned....
FYI. Bob stated that the MAC can do High-Rez as is, no driver needed.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on November 05, 2010, 03:50:43 PM
thanks for the information. Let's see what other people say when they get their unit in.

btw, how did you find this forum? Do you plan on using the usbpre2 to record music onto a recorder via spdif / optical or are you strictly interested in playback from your computer? I see you're trying to record to your computer. What application are you using?
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 05, 2010, 04:26:01 PM
thanks for the information. Let's see what other people say when they get their unit in.

btw, how did you find this forum? Do you plan on using the usbpre2 to record music onto a recorder via spdif / optical or are you strictly interested in playback from your computer? I see you're trying to record to your computer. What application are you using?

I am a manufactures rep selling "High End" 2 channel equipment. I have been using a SD 722 with a 250gb upgraded hard drive to play back high-rez files from HDTracks.com (24/96) and the new HRx discs (24/176) from Reference Recordings. I like to have reference demo material when I'm visiting dealers. The 722 has a clumsy file system (filenames trunkcated and sorted by date, not alphabetically). I also have a pair of Neumann omni’s that I record some acoustic guitar and voice. I also do some transfers of vinyl records to high-rez digital. I was hoping to use a netbook and the USBPre 2 for my portable demo unit (playback only). My home system is running Media Monkey (for playback) and Audition (for recording) on a desktop PC running Vista>RME sound card AES/EBU out (ASIO driver)>Benchmark DAC 1.

I have been looking at the Recording Gear forum for years but never had a post.
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 05, 2010, 06:04:16 PM
I just received a call from Bob Mondok from Sweetwater regarding the above lack of ASIO driver problem.
Bob talked to an engineer at SD and was told that a ASIO driver IS needed for High-Rez recording and playback.
Bob stated that SD MAY have a ASIO solution next week. This should have been stated on their website! So stay tuned....
FYI. Bob stated that the MAC can do High-Rez as is, no driver needed.
Title: Re: Sound Devices USBPre 2
Post by: tracker on November 05, 2010, 09:46:51 PM
dadeo, have you tried using asio4all?

not sure how well it would work, but might be good enough to tide you over till SD's own asio?
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 06, 2010, 12:26:00 PM
dadeo, have you tried using asio4all?

not sure how well it would work, but might be good enough to tide you over till SD's own asio?

I configured the ASIO Plug-In for Media Monkey. I installed ASIO4ALL and configured it for the USBPro 2. Media Monkey won't even play 24/88 files or above through the USBPre 2. 16-24/44 and 16-24/48 files play fine. When I don't use the ASIO dirvers (using Windows drivers) I can play the high-rez files through the USBPre 2 but they are downsampled to 24/48. If SD doesn't come up with a solution soon I will be returning my unit. So Sad.
Title: Re: Sound Devices USBPre 2
Post by: su6oxone on November 06, 2010, 12:50:33 PM
If SD doesn't come up with a solution soon I will be returning my unit. So Sad.

Why don't you just call SD directly to inquire about the issue and when they anticipate a solution will be released.
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 06, 2010, 03:14:36 PM
If SD doesn't come up with a solution soon I will be returning my unit. So Sad.

Why don't you just call SD directly to inquire about the issue and when they anticipate a solution will be released.

I earlier in the week (before I purchased the unit) emailed Joe Ramos at SD and he told me that for High-Rez no special drivers were needed for a PC (Plug n Play). I told him that I think that is incorrect based on what I have read about High-Rez on a USB line from computeraudiophile.com. Later that day I got another email from him stating that he talked to an engineer and a driver would be needed and it would be included or be on their website for download. I then put in an order for one at Sweetwater. When I got the unit there was no driver, nor one on their website. Upset that the unit didn't play High-Rez I called SD on Friday and talked to Nic and he confirmed that an ASIO driver would be needed for High-Rez. He then told me that no drivers were planed at this time. I then called Bob Mondok at Sweetwater about the problem and he gave me a RA to return the unit. Bob then called an engineer at SD to find out about this problem. Bob then called me back and told me that the engineer did state that a driver will be needed and they may have an answer next week. Sweetwater told me to keep the unit and wait to see if there is a driver in a timely manner. If not I can return it.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 06, 2010, 06:44:37 PM
dadeo, have you tried using asio4all?

not sure how well it would work, but might be good enough to tide you over till SD's own asio?
So Sad.

I can see it being a disappointment to you.  And maybe even more so due to the fact it was presented to you as being able to fulfill your specific needs.    It seems as if this units has been focused at the recording side of the fence not the playback.  And in that respect it is far from a sad day for the USBPre2.  I for one am thrilled to see a unit at this price point with the feature set it has.   But, I am planning on using it for recording and not for playback of any kind.  In fact I doubt if my unit will ever be hooked up to a computer.   I see it as a combination of the MP-2/mixpre, the USBPre 1.5 and a unit that supplies a digital output.  And at that it hit the nail on the head supplying a quality unit at a great price.  Nothing sad about that.   Sorry that it is not working out for you.  Aren't there soundcards that will give you the resolutions you want?  What were you using before this for a portable unit?
Title: Re: Sound Devices USBPre 2
Post by: dadeo on November 06, 2010, 07:19:04 PM
dadeo, have you tried using asio4all?

not sure how well it would work, but might be good enough to tide you over till SD's own asio?
So Sad.

I can see it being a disappointment to you.  And maybe even more so due to the fact it was presented to you as being able to fulfill your specific needs.    It seems as if this units has been focused at the recording side of the fence not the playback.  And in that respect it is far from a sad day for the USBPre2.  I for one am thrilled to see a unit at this price point with the feature set it has.   But, I am planning on using it for recording and not for playback of any kind.  In fact I doubt if my unit will ever be hooked up to a computer.   I see it as a combination of the MP-2/mixpre, the USBPre 1.5 and a unit that supplies a digital output.  And at that it hit the nail on the head supplying a quality unit at a great price.  Nothing sad about that.   Sorry that it is not working out for you.  Aren't there soundcards that will give you the resolutions you want?  What were you using before this for a portable unit?

The problem with not doing High Rez also applies to the recording side also using the USB. For recording I have a SD 722. As a stand alone Mic Pre and A/D, D/A it is great. I explain what is my purpose a few posts earlier. I'm sure with time this will all be solved by SD. It is not like them to stumble out of the gate. They are a class act all the way.
Title: Re: Sound Devices USBPre 2
Post by: tracker on November 06, 2010, 09:37:22 PM
dadeo, thats odd that you get that with asio4all as well.

playback problems aside,... any initial impressions about how the preamps sound compared to your 722?
Title: Re: Sound Devices USBPre 2
Post by: twatts (pants are so over-rated...) on November 07, 2010, 01:21:34 AM
Terri,

The problem with dropping voltage from 12v to 5v using a common voltage regulator will be heat. 

circd (only because you misspelled my name  ;D),

I found this, that may alleviate the heat issue...  http://www.donrowe.com/inverters/elite_180.html

I've cut the car-plug off these kind of things before and installed a 4-pin XLR for use with an SLA...  I'm sure with a little more digging and work, something could be worked out... 

And since this is a pure-sine wav adapter, you could run your tube mic off the ac outlet and the usb pre 2 off the usb, all off a 12vdc source???  Hawt!!!

Terry
Title: Re: Sound Devices USBPre 2
Post by: sunjan on November 08, 2010, 04:51:18 AM
Bob stated that the MAC can do High-Rez as is, no driver needed.

If you need a stopgap, just borrow or buy a Mac in the meantime then... Functional Intel Macbooks can be had for $400 used:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=390259175297

Or if you're willing to experiment, Hackintosh your netbook and install OSX. Most models are compatible:
http://www.mymacnetbook.com/compatibility-chart/

Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 08, 2010, 11:42:48 AM
Just got my box in.  Issue alert: the User Guide has a diagram for the dip-switch settings for various sample rates in the stand-alone mode.  These disagree with the settings printed on the bottom of the device.  The manual pages are incorrect according to SD.  The manual was for revision 1 and not the shipped version.

Jeff
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 08, 2010, 05:21:15 PM
Yep just arrived...... Fresh outa the box.  Here are some pix alongside an MP-2.   Initial report, no power switch.  That kinda surprised me but I guess with usb that makes sense.   The Second report is the adapter box I made works perfectly.  Powers up the MP-2 and the USBPre2 just fine, no heat issues with the voltage regulator.  Be happy to make one for ya or help you make one, just get in touch.  Can't wait to run it now!
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 08, 2010, 05:34:26 PM
Nice!  It is much smaller than I expected. 

Yep just arrived...... Fresh outa the box.  Here are some pix alongside an MP-2.   Initial report, no power switch.  That kinda surprised me but I guess with usb that makes sense.   The Second report is the adapter box I made works perfectly.  Powers up the MP-2 and the USBPre2 just fine, no heat issues with the voltage regulator.  Be happy to make one for ya or help you make one, just get in touch.  Can't wait to run it now!
Title: Re: Sound Devices USBPre 2
Post by: ashevillain on November 08, 2010, 05:47:12 PM
Nice!  It is much smaller than I expected. 

For real! Looks like it would fit nicely in my bag. Although seeing it pictured next to the MP-2 makes me kinda sad....doesn't matter though since I can not afford one.
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 08, 2010, 06:11:50 PM
I can't afford one either, but I'm tempted to sell my MP2 and littlebox to fund the purchase!!  I think I'll wait to see how field testing goes.

Nice!  It is much smaller than I expected. 

For real! Looks like it would fit nicely in my bag. Although seeing it pictured next to the MP-2 makes me kinda sad....doesn't matter though since I can not afford one.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 08, 2010, 07:50:00 PM
I can't afford one either, but I'm tempted to sell my MP2 and littlebox to fund the purchase!!  I think I'll wait to see how field testing goes.

Nice!  It is much smaller than I expected. 

For real! Looks like it would fit nicely in my bag. Although seeing it pictured next to the MP-2 makes me kinda sad....doesn't matter though since I can not afford one.



wow I dunno if I would give those up for this.  I needed a pre with coax output so it replaced my UA-5. 
Title: Re: Sound Devices USBPre 2
Post by: tracker on November 08, 2010, 08:21:07 PM
oh that's a nice looking setup kirkd!

how does the unit sound?
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 10:40:22 AM
Get my box last night and played around with it for awhile.  Wasn't able to lock onto a coax out signal from it yesterday.   I adjusted the sample rate settings but am unsure of how to set bit rate for stand-alone mode.  Anyone know how or if you can set bit rate?
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 10:53:09 AM
Oh and the line in appears to have more headroom so I'll be making a set of xlr > 1/4 for when I run my sonosax infront of the USBpre2.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 09, 2010, 12:01:49 PM
Get my box last night and played around with it for awhile.  Wasn't able to lock onto a coax out signal from it yesterday.   I adjusted the sample rate settings but am unsure of how to set bit rate for stand-alone mode.  Anyone know how or if you can set bit rate?

No setting for bit rates.   I can't get my 680 to lock on a spdif signal.  Calling SD now.
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 09, 2010, 12:15:04 PM
I'm not sure what you mean by bit rate.  Are you talking about bit depth or sample rate?  If it is sample rate, these are set by DIP switch B according to the manual, switches 8, 9, and 10.  Are these switches not working?

??? Sorry, still trying to understand what your issue is.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 12:47:51 PM
I'm not sure what you mean by bit rate.  Are you talking about bit depth or sample rate?  If it is sample rate, these are set by DIP switch B according to the manual, switches 8, 9, and 10.  Are these switches not working?

??? Sorry, still trying to understand what your issue is.

Bit depth. 

I had no luck getting locking to the digital out at any of the sample rates and corresponding sample rate on my R44. 

The dip switches adjust sample rate (44, 48, 96 etc) but how do you set bit depth (8, 16, 24)?   I'm hoping that bit rate setting (default or controlled) might be a potential reason why I'm not locking to the signal. 
Title: Re: Sound Devices USBPre 2
Post by: rastasean on November 09, 2010, 12:50:09 PM
I thought the machine it was connecting to was 'responsible' for setting the bit rate. set the r44 to 48/24 and the preamp should adjust.

is that the problem, fails to do that?
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 01:02:01 PM
In standalone mode, you set the sample rate via dip switches.   When using the USBpre 2 in interface mode, you set the sample rate in the Windows/MAC OS. 

Per a phone discussion with Sound Devices, the USBpre 2 always sends a 24 bit digital signal out when in either standalone or interface mode.

When I get home I will continue playiing around with the dip switches (to try other rates) and trying another device to accept the digital signal (audiophile 24/96 soundcard). 
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 09, 2010, 01:23:37 PM
Well, that's disconcerting.

Many recorders need to be set to the same sample rate as the external A?D (meaning, it won't auto-select).  Have you tried making sure the R44 is set to what you're setting the USBPre to? (e.g., 24/48 for both units)
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 09, 2010, 01:57:12 PM
OK so I run a Tascam 680 and am having the same problems.  I got NO digi lock at either 48Hz or 96Hz.  Yet the POS MT-1 shows signal :o  ??? Using the same cable I get perfect lock with my Apogee ???   Trying to work through it with Nic @ SD but I am a little concerned to say the least.  I'll let Ya'' know what happens. 
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 02:10:15 PM
Well, that's disconcerting.

Many recorders need to be set to the same sample rate as the external A?D (meaning, it won't auto-select).  Have you tried making sure the R44 is set to what you're setting the USBPre to? (e.g., 24/48 for both units)

Yep, I've set the R44 to the same sample rate as the USBPre 2 but no luck. 

OK so I run a Tascam 680 and am having the same problems.  I got NO digi lock at either 48Hz or 96Hz.  Yet the POS MT-1 shows signal :o  ??? Using the same cable I get perfect lock with my Apogee ???   Trying to work through it with Nic @ SD but I am a little concerned to say the least.  I'll let Ya'' know what happens. 


I wonder if they have something in the s/pdif "protocol" that the USBPre 2 is sending that the R44 and the 680 don't like.........I've had no problems accepting the digital signal (via a bnc to coax connector) from a 744 before.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 09, 2010, 02:22:23 PM
Is this the first Sound Devices box that outputs s/pdif instead of bnc (aes) digital signals?
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 09, 2010, 02:28:41 PM
With SD pre set @ 48 and Tascam @ 44.1 I get a lock ??? ??? ???
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 09, 2010, 02:39:49 PM
OK so it get weirder...If I set the Tascam to 44.1Hz and the SD pre to 48Hz I get a lock.   If I set the SD pre to anything else, I get a lock but no signal coming in.  If I set the 680 to anything else it won't lock to the SD preamp.  It seems like an issue with the signal the SD preamp is putting out.  The Tascam has never had an issue locking to a UA-5, An AD-1000 or even a Yamaha digital SBD.   Waiting to hear back for the SD peeps.  I bet they are freaking out with the engineers right now.  Keeping my finger crossed for a simple fix via an update.  But I think it might require something inside the unit.



Update @ 1PM PDT.  Waiting for word back from engineers and Tech.  Said they would have something by this afternoon.  I don't know crap about the digital end of things and A/D chips etc, but the only setting that my Tascam will give me a lock at is 44.1Hz.  BUT the USBPre2 has to be set for 48Hz.  Man I am really hoping it can be solved with some sort of update you can download.  I did check my 680 with a UA-5 and an AD-1000 and they both lock in at 48Hz like they are supposed to. 
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 09, 2010, 04:30:24 PM
With SD pre set @ 48 and Tascam @ 44.1 I get a lock ??? ??? ???

Someone else was having troubles getting cheaper A/D's locked to his 680, with two different A/D's.  Check these posts in the 680 thread:
http://taperssection.com/index.php?topic=137231.msg1803601#msg1803601
http://taperssection.com/index.php?topic=137231.msg1811156#msg1811156

This may be a problem with the USBPre, but something might be weird with the 680, or a lot of 680's might have problems.  I've used my 680 with a V3 sending signal without a problem, as have others.  And people have used UA-5's successfully too.  I've got a friend though with a 680 who can't get a digital signal from his V3, but he can get a signal from his Mytek.

And you can get a signal from your AD1000, but not the USBPre.  ???  Who knows what the issue is, but with all these problems with getting a digi signal locked on the 680 side, it might be the 680 and not the USBPre.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 09, 2010, 04:58:49 PM
Well I don't know where the problem is but the fact that with the Tascam set to 44.1 I can get a digi lock at ANY setting on the USBPre2 makes me think it could be the preamp.  SO far, I've used the 680 with a V3, 2 different UA-5's, an AD-1000 and a Yamaha digital SBD.  All with out an issue.  The other thing is that I am the only person so far with issues on the 680 and only the second person to have an kind of locking issues.  So I have no clue what the problem is.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on November 09, 2010, 08:50:21 PM
it does seem like the issue would be with the usbpre2.

Did you hear anything more, kirk?
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 09, 2010, 09:05:34 PM
Could well be the USBPre, but you aren't the only one with troubles with getting a digital signal to lock using the 680.  You're having problems, the guy in the 680 thread failed to get a digi signal using 2 different external A/D's, and my friend can't get his V3 to work with the 680, even though his mytek works fine.

As much as I like my 680, all these issues people are having feeding a 680 a digital signal are disconcerting.  Hopefully at least the USBPre>680 issues can be tracked down and solved with a new firmware or something. 

I've been thinking of getting a V3 or USBPre to go with my 680, and though I've used one borrowed V3 successfully to feed my 680 a digi signal, all these issues make me nervous about plunking down to get a new A/D just to find that it might not work with the 680. >:(
Title: Re: Sound Devices USBPre 2
Post by: rastasean on November 09, 2010, 09:19:40 PM
Well if its a SD issue and can be tracked down to that, I'd rest assure knowing SD would fix it. I don't see how we as end users could do a firmware upgrade/update since no drivers are needed for the computer, so maybe these units will have to be sent to them. :(

I don't see anything in the sound devices forum...yet.
http://forums.sounddevices.com/index.php
Title: Re: Sound Devices USBPre 2
Post by: tcf on November 09, 2010, 09:23:12 PM
My 680 is very particular with various digi inputs. My microtrack takes everything I've thrown at it.
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 10, 2010, 10:52:07 AM
I am currently testing my USBPre 2 in stand-alone mode with a Sonosax MiniR82.  With the dip switches set as printed on the machine (NOT as in the manual) the Sonosax is correctly locking on a 96kH 24 bit signal from the USBPre 2  I am using Navaton MKE400 mics, which are rated to draw 10ma, which is the max the USBPre 2 is rated for phantom.  I am powering with a Cinch 4000 mAh USB power supply (5 oz) to see if I need to upgrade to a larger power supply or whether a small one will carry this ok.

Jeff
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 10, 2010, 11:33:45 AM
Ugh. 

Bad News:  I can't get my R44 to lock onto anything (USBPre 2, soundcard outs, squeezebox outs) now.  Maybe it's my R44 as the trouble child.

Good News: The USBPre 2 locks onto my soundcard, squeezebox and R44. 

I haven't used the digital in on my R44 for over a year.  Maybe my digital in on the R44 is damanged.  Lent out the unit a few times but never heard of any issues.  I will have access to another R44 tomorrow and I will test sending signal between them (R44 to R44) and then USBPre 2 to the other R44.  Tonight I will try sending digital signal to my soundcard from the USBPre 2.
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 10, 2010, 12:15:48 PM
We haven't had any other reports of issues with the S/PDIF output from the USBPre 2 to other gear yet and we're investigating the way the DR680 senses sample rate. Good to hear you got signal from the USBPre 2 into your computer, Brian (Well it's good for me at least. Maybe not so much for you). The test of running the USBPre 2 into another R-44 should help shed more light on the situation. Let me know.

Just to let you guys know: We're actively investigating these specific issues right now. We're making some headway and we'll have some information in the near future.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on November 10, 2010, 01:26:31 PM
I am currently testing my USBPre 2 in stand-alone mode with a Sonosax MiniR82.  With the dip switches set as printed on the machine (NOT as in the manual) the Sonosax is correctly locking on a 96kH 24 bit signal from the USBPre 2  I am using Navaton MKE400 mics, which are rated to draw 10ma, which is the max the USBPre 2 is rated for phantom.  I am powering with a Cinch 4000 mAh USB power supply (5 oz) to see if I need to upgrade to a larger power supply or whether a small one will carry this ok.

Jeff

Hi Jeff,

Do you still have a SONY D50? I would be interested to know how the USBPre 2 connects digitally with it.

Thanks,

Phillip
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 10, 2010, 01:37:24 PM
Do you still have a SONY D50? I would be interested to know how the USBPre 2 connects digitally with it.

I know you aren't asking me, but I can say that the PCM-D50 that we have here in the support office doesn't have any problem receiving optical signal from the USBPre 2. I was just testing that for another user yesterday.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on November 10, 2010, 01:44:23 PM
Do you still have a SONY D50? I would be interested to know how the USBPre 2 connects digitally with it.

I know you aren't asking me, but I can say that the PCM-D50 that we have here in the support office doesn't have any problem receiving optical signal from the USBPre 2. I was just testing that for another user yesterday.

Thanks, Nic. This info from any source is much appreciated!

Phillip
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 10, 2010, 02:02:42 PM
I tried this while still testing the Sonosax, since the toslink output is also active.  My D50 does show a digital signal  in, but it says it is getting a 44.1/16 bit signal.  The clock, however, is running way fast, so I assume it is recording a higher sample rate with the wrong flag.  The Core Sound Mic 24/96 had the same issue with the Sony, took them forever to "fix" it, also the V3 years ago (they fixed it very fast!). 

Jeff
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 10, 2010, 02:51:03 PM
Nic and SD peeps are all over this issue.  Talk about customer service. 

Meanwhile I did run the updates to the firmware on the DR-680 and still get the same issue.  I did speak with Tascam/Teac tech support and they are sure it is not something "wrong" with the 680.  With out muddying the waters here with 680 talk, I've shared what I learned from Tascam with Nic and his crew so now we just wait and see.   There is also a possibility that "maybe" some future firmware for the 680 could make it more compatible reading all types of digital inputs.  But I gotta say Tech support made that "maybe" sound far off and unlikely. 
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on November 10, 2010, 03:08:15 PM
I tried this while still testing the Sonosax, since the toslink output is also active.  My D50 does show a digital signal  in, but it says it is getting a 44.1/16 bit signal.  The clock, however, is running way fast, so I assume it is recording a higher sample rate with the wrong flag.  The Core Sound Mic 24/96 had the same issue with the Sony, took them forever to "fix" it, also the V3 years ago (they fixed it very fast!). 

Jeff

When you play back the D50 file, does it show as 24/96 on the D50 display?

Phillip

Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 10, 2010, 03:44:31 PM
No, the D50 display shows 44.1/16 both when recording the input and when playing it back.  However, the playback makes me sound like a drugged hyper-basso, it is clearly recording a 96kH signal and playing it back as if it were 44.1kH, I have no clue why the 16 bit truncation (if it is that).

Jeff
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 10, 2010, 03:47:38 PM
No, the D50 display shows 44.1/16 both when recording the input and when playing it back.  However, the playback makes me sound like a drugged hyper-basso, it is clearly recording a 96kH signal and playing it back as if it were 44.1kH, I have no clue why the 16 bit truncation (if it is that).

I just confirmed this too. When I tested it yesterday, I was testing with the USBPre 2 set to 44.1k, so I didn't notice the issue (didn't consider the significance of the fact that the D50 was showing 16 bits as opposed to the 24 bits that the USBPre always outputs). Good news is that this is the same basic behavior as the DR-680. I'll have something more informative (and likely good) to say in the next few days, I promise.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 10, 2010, 04:28:11 PM
Can't wait.   I would have never expected a company the size of SD to provide so much support to their customers.  Before and after the release ;D
Title: Re: Sound Devices USBPre 2
Post by: braweave on November 10, 2010, 07:04:26 PM
didnt someone say something a few pages back about the manual and the back being off (i.e. one was wrong)

since you said it locks when the usbpre2 is at 44 and the deck is at 48 and vice versa. could it be that the labels on the usbpre 2 could be wrong? I.E. when you think the dip switch is at 44 it is at actually at 48?

just a thought...
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 11, 2010, 11:07:25 AM
The settings printed on the unit are the correct settings.  The other thing I can confirm is that the 680 would not lock at settings of 44.1...96...192  I did not try any other, well except for the 48 setting which gave me the weird results.   I had though the same thing....maybe the settings were reversed, or maybe the arrows got printed upside down.  I tried them all. 

I'm sure that SD after hearing if this stuff is working on a solution.   My manual is different compared to the printed settings on the unit.  The misprint in the manual is they missed 172.4 and then then put an 8 settings when in reality there is not one. 
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 11, 2010, 02:26:41 PM
I was told that the manual is not a "misprint" but rather refers to an earlier version of the final build.

When a similar issue arose with the Core Sound Mic 2496 version 2, they had to replace a chip.  Not sure how the SD USBPre 2 will handle any upgrade.

Good news: I foolishly took the USBPre 2 along today and substituted it for my V3 to feed (digitally) an R44, without testing how the R44 took the signal.  It seems to have recorded correctly, no issues I can see.

Jeff
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 11, 2010, 02:32:36 PM
The graphic in the DIP Switch section of the manual was incorrect. I uploaded a corrected version yesterday afternoon.
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 11, 2010, 05:58:27 PM
So we have this narrowed down and we're pretty confident we have a solution. Some devices determine sample rate by actually measuring the rate of incoming samples (7-Series, USBPre, etc) and other devices determine sample rate by reading embedded data in the S/PDIF stream (DR-680, PCM-D50, etc). The USBPre 2 wasn't sending out this embedded data. I just got done testing a beta version of firmware for the USBPre 2 that behaves properly with the PCM-D50 (i.e. the PCM-D50 in record-pause will show the proper sample rate and bit depth of signal being fed from the USBPre 2). We will be releasing this firmware once it finishes our standard round of testing.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 11, 2010, 06:14:14 PM
You da man!  Can't wait to hear the results of your testing ;D
Title: Re: Sound Devices USBPre 2
Post by: MichaelPatrick on November 11, 2010, 11:36:35 PM
Nic, thanks for taking the time to not only explain but post pictures for (me) us.  And I agree, your input and you feedback here are great.  It's a tangible selling point for me that a manufacturer is not just responding but implementing ideas garnered from the discussions.   You set the bar pretty high for other people who would follow your lead.  I cannot wait to get delivery of the pre. 

So gang, while I was originally going to use a voltage regulator on one of my 9V dvd batteries, I am thinking of going another direction.  Mostly because I am looking for a 12V source for my Apogee AD1K.  I leaning towards the battery on flea bay that has 5v, 9V, &12V outputs.  There's been some ok feedback from buyers.   I still might make a 5V step down too since the parts are so cheap.  How are you guys figuring on powering the unit in the field?

This battery sells for about $70 at Amazon and other internet dealers. http://www.lenmar.com/web/ProductDetails.aspx?ProductID=PPU916
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 12, 2010, 03:31:18 AM
I was able to test my USBPre 2 with another R44 and sucess!   No problems locking onto a 24/48 signal from it.   Bad news, my R44 has a bad coax in.   Looks like I need it serviced.  Paging Busmann. 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 13, 2010, 10:00:58 AM
UPDATE:  Sound Devices should be announcing the fix soon to solve the digital issues discussed here.  I'm sure Nic will post a link as soon as it is ready.  It is a real easy firmware update. 

I want to get out as soon as I can to run this in the field.  I did some real basic battery test using the Voltage regulator box I built.  So far so good.  I ran the 680 and the USBPre2 off the same battery for about an hour and a half and it dropped one light on the dvd battery, that was a battery that had been sitting for awhile.  It showed a full charge to start.  I'll do a better test and report back.  After running it that long the box was not even warm, so there are no heat issues to report. 

Once I get to use it I'm gonna run it digi in and analog in just to see how, if any, the 680 flavors the sound. 
Title: Re: Sound Devices USBPre 2
Post by: snailed on November 13, 2010, 11:46:51 PM
hi all, first post here, so i apologize for the newbie question...

what is the best way to properly power this for field use?  not looking to power any other devices - i'd be looking to just power the USBPre 2 to go into a Zoom H2 or possibly a Microtrack.  I want to use the USBPre 2 as a field mixer and preamp to go into one of those recorders.  Will the simple AA battery powered USB chargers that are sold on ebay on the cheap actually provide enough power?  Are there any advantages to buying a more expensive battery solution?  Does anyone have any recommendations that will definitely work for this unit? 

thanks, and I know a lot of this has been covered in the thread already - I just want to be totally clear on this before I put down the money for a USBPre 2 (unfortunately I don't know much about putting together my own power supply like Kirk has done).
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 14, 2010, 04:32:23 PM
The USBPre2 power requirements(page 19 of the manual):
5 V (+/- 10%), 500 mA .  Anything that supplies that via a usb plug will work.   I'd be happy to make you a setup to work with the 9 volt dvd batteries if you wanted.  Just send me a pm and we'll talk. 
Title: Re: Sound Devices USBPre 2
Post by: sunjan on November 15, 2010, 03:07:49 AM
Will the simple AA battery powered USB chargers that are sold on ebay on the cheap actually provide enough power?  Are there any advantages to buying a more expensive battery solution?

1. More mAh = longer running time between recharges. Of course AA battery sleds will work, but it remains to be tested how long running time you'll get with 4 or 8 NiMH batteries. If your need is only 3-4 hours, you should hopefully be fine, as long as you use high quality AA's.
2. Li-based battery chemistry has higher energy density, meaning you'd carry less weight equivalent for the same running time.
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 15, 2010, 01:17:39 PM
The tiny (under 5oz) Cinch Power CP505 (lithium) I tried out is rated at 5000 mAh at 3.7V (why do they use 3.7V when they are 5V devices, is there some standard I am unaware of here?), I got over 6 hours before I shut it down and two of the three lights were still on.  This was using Nevaton mics, rated are at the USBPre 2 max draw of 10 mA each.  This battery will put out up to 950 mA, but assuming it is feeding the USBPre no more than 500 mA I should get at least 7.4 hours (right?).

Jeff
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 15, 2010, 02:07:51 PM
The 3.7 volt rating is ear outside the printed parameters which on the low side would be 4.5 volts.  Not to say it won't work.  We as tapers run many devices below the printed power requirements.  The 680 and HD-P2 are perfect examples.  Both rated at 12volts yet work perfectly at 9 volts.  Have you recorded anything with it yet?  How does it sound?  Maybe Nic could check with the engineers to see what if anything is affected by using lower power into the deck?  OR maybe a phone call to SD?  I wonder what it actually supplies at the mics for phantom if you only supply it with 3.7 volts.  Does that drop your phantom voltage too?
Title: Re: Sound Devices USBPre 2
Post by: WiFiJeff on November 15, 2010, 02:21:49 PM
I think you misunderstood my post.  The battery is rated "Output 5V 950 mA" and it runs the USBPre 2 fine, I recorded to a Sonosax MiniR82 digital-in.  But the battery also says on it  "Capacity: 5000 mA at 3.7V" and I was asking why the capacity is measured at 3.7V when the output seems to be at 5V.  Why not a capacity rating like 3700 mA at 5V, which would be the same power capacity?

Jeff
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 15, 2010, 02:23:11 PM
As I understand it, the Cinch CP505 puts out 5v.  I think what WifiJeff was referring to is that Cinch lists it at 5000mA-hr at 3.7v.  This is probably because it uses a 5000mA-hr, 3.7v li-ion battery internally, then steps the voltage up to 5v.

As to how long it will last, 5000mAhr @ 3.7v = 18500 mW-hr capacity, divide then by 5v = 3700mA-hr at 5v.  But this is assuming a 100% efficient step up from 3.7v to 5v.  Assuming that is more like 85% efficient, leaves you 3145mA-hr at 5v, so about 6.3 hours of runtime at a 500mA draw.

The 500mA draw is the max draw though, not average.  Who knows what that is -- maybe 425mA as a total guess?  That might mean more like 7.5 hours of runtime.
Title: Re: Sound Devices USBPre 2
Post by: Todd R on November 15, 2010, 02:25:13 PM
Sorry Jeff, you were posting when I was typing.

Why not 3700mAhr at 5v, rather than the 5000mAhr at 3.7v they state?  Marketing hype.  I'd guess it gets back to the actual size of the internal battery used in the CP505.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 15, 2010, 03:00:14 PM
I did misunderstand and thought you had run it on 3.7 volts.  And it seems that real answer you were after is covered already.  I don't know if this has any bearing but maybe the manufacturers are required to rate it at actual battery voltage and not what they design a unit to output with other electronic parts.  I am itching to get out and run this stuff at a show.   
Title: Re: Sound Devices USBPre 2
Post by: sunjan on November 15, 2010, 04:40:13 PM
why do they use 3.7V when they are 5V devices, is there some standard I am unaware of here?
Maybe the OP already knows this, but 3.7V is the nominal cell voltage for Li-ion. This is the inherent native voltage for this particular battery chemistry, so I guess you could say that it's a standard of sorts.  ;D
http://en.wikipedia.org/wiki/Lithium-ion_battery#Specifications_and_design
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 16, 2010, 03:50:54 PM
Has the digi signal locking issue with the DR680 and Sony D50 been resolved??
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 16, 2010, 04:09:37 PM
Has the digi signal locking issue with the DR680 and Sony D50 been resolved??

Well, yes and no.  Officially they have not released the fix yet.  But, I was told that there is a fix.  I am assuming they will run it through it's paces to be sure before it is official.  The word on the street is that it solves the problem.  It had something to do with the way the Tascam and Sony unit read the incoming data stream.  So now the USBPre2 outputs the information the Tascam/Sony units are looking for.   Those two units(maybe others?) get their lock off the header information and not be reading the signal itself.  Sorry for the nontechnical explanation but it gets way over my head at this point.  Initial testing looks good so far.   I'm sure that Nic will post a link for the firmware update as soon as it is ready. 

Title: Re: Sound Devices USBPre 2
Post by: MichaelPatrick on November 16, 2010, 09:14:59 PM
I'm confident that Sound Devices will get this right --they always do-- so I ordered a USB Pre 2.  I'm going to test the SPDIF out with a few devices when it arrives.  If it has problems after loading the code fix I'll post something here.  We'll test it with Edirol R-44, Tascam HD-P2, MicroTrack II, Tascam DR-680, SD 788T, and of course a computer via USB 2.0.
Title: Re: Sound Devices USBPre 2
Post by: NicStage on November 24, 2010, 04:22:37 PM
Firmware posted. Just in time for your Thanksgiving recording sessions...

http://sounddevices.com/download/usbpre2-firmware.htm
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 24, 2010, 04:35:54 PM
Nice!

Firmware posted. Just in time for your Thanksgiving recording sessions...

http://sounddevices.com/download/usbpre2-firmware.htm
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 29, 2010, 03:23:27 PM
Anyone used one in the field? 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 29, 2010, 03:58:19 PM
Thought I'd post here first before the yard sale....I am about to switch over the voltage regulator I had tried to build for my Apogee.   I will be making a voltage regulator box for the USBPre2.  It will accept a 9V DVD battery input.  It will output 5 volts via a USB connector for the USBPre2.  It will also have a 9 volt pass thru.  The 9 volt pass thru will have a polarity switch in order to be used with either center pin negative or positive devices.  The pass thru will have an adapt-a-plug end so that you can put what ever plug you want on the end.If you are interested in buying this let me know. I have not finished it yet so I could make the the input  be able to hot swap batteries if you wanted.  I could also add more outputs too if you wanted to run more than two devices off a single unit or if you wanted both outputs to be 5 volts.  I was thinking with hot swap, polarity switch and dual outputs selling it for $40.  I'll post some pictures later as it comes together, Kirk
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 29, 2010, 04:37:00 PM
Anyone used one in the field?

Ran mine on Friday.   Had to run it mic in (phantom off) from my sonosax so it went thru the pres on both units.   Ordering cabling to run into the line-in section (1/4 TRS) which allows for a hotter (pro level) signal and bypasses the pres.   I've going to make a set of xlr splitters this weekend so I'll be able to run a few good comps (24/48) at Christmas Jam in a few weeks using DPA 4023s (FOB) into various combinations of my R44, Sonosax SX-M2 and USBPre 2.  8 sets makes for 8 comps.

---------------------------------------------------------------------------------------------
1. 
Sonosax SX-M2 (pre)  > Edirol R44 (a/d conversion)
vs
Sonosax SX-M2 (pre)  > USBPre 2 (a/d conversion) > Edirol R44
---------------------------------------------------------------------------------------------
2. 
Sonosax SX-M2 (pre) > Edirol R44 (a/d conversion)
vs
USBPre 2 (pre) > Edirol R44 (a/d conversion)
---------------------------------------------------------------------------------------------
3. 
Sonosax SX-M2 (pre) > Edirol R44 (a/d conversion)
vs
USBPre 2 (pre, a/d conversion) > Edirol R44 (a/d conversion)
---------------------------------------------------------------------------------------------
4.
USBPre 2 (pre, a/d conversion) > Edirol R44
vs
USBPre 2 (pre) > Edirol R44 (a/d conversion)
---------------------------------------------------------------------------------------------
5. 
Edirol R44 (pre, a/d conversion)
vs
USBPre 2 (pre, a/d conversion) > Edirol R44
---------------------------------------------------------------------------------------------
6. 
Edirol R44 (pre, a/d conversion)
vs
USBPre 2 (pre) > Edirol R44 (a/d conversion)
---------------------------------------------------------------------------------------------
7. 
Edirol R44 (pre, a/d conversion)
vs
Sonosax SX-M2 (pre) > USBPre 2 (a/d conversion) > Edirol R44
---------------------------------------------------------------------------------------------
8. 
Edirol R44 (pre, a/d conversion)
vs
Sonosax SX-M2 (pre) > Edirol R44 (a/d conversion)
---------------------------------------------------------------------------------------------
Title: Re: Sound Devices USBPre 2
Post by: page on November 29, 2010, 04:47:31 PM
Anyone used one in the field?

Ran mine on Friday.   Had to run it mic in (phantom off) from my sonosax so it went thru the pres on both units.   Ordering cabling to run into the line-in section (1/4 TRS) which allows for a hotter (pro level) signal and bypasses the pres.   I've going to make a set of xlr splitters this weekend so I'll be able to run a few good comps (24/48) at Christmas Jam in a few weeks using DPA 4023s (FOB) into various combinations of my R44, Sonosax SX-M2 and USBPre 2.  8 sets makes for 8 comps.

I have a set of single female end to dual male end cables already made if you want to borrow them. XLRs on both ends, but you could use adaptors if you want to run the 1/4" for the USBPre.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 29, 2010, 04:50:50 PM
Anyone used one in the field?

Ran mine on Friday.   Had to run it mic in (phantom off) from my sonosax so it went thru the pres on both units.   Ordering cabling to run into the line-in section (1/4 TRS) which allows for a hotter (pro level) signal and bypasses the pres.   I've going to make a set of xlr splitters this weekend so I'll be able to run a few good comps (24/48) at Christmas Jam in a few weeks using DPA 4023s (FOB) into various combinations of my R44, Sonosax SX-M2 and USBPre 2.  8 sets makes for 8 comps.

I have a set of single female end to dual male end cables already made if you want to borrow them. XLRs on both ends, but you could use adaptors if you want to run the 1/4" for the USBPre.

I'd love to but the materials are due in tomorrow.  Oh the cabling making fun!
Title: Re: Sound Devices USBPre 2
Post by: jbell on November 29, 2010, 05:06:16 PM
The line in isn't XLR??  I'll be at Xmas jam, really want to see one of these. 

Anyone used one in the field?

Ran mine on Friday.   Had to run it mic in (phantom off) from my sonosax so it went thru the pres on both units.   Ordering cabling to run into the line-in section (1/4 TRS) which allows for a hotter (pro level) signal and bypasses the pres.   I've going to make a set of xlr splitters this weekend so I'll be able to run a few good comps (24/48) at Christmas Jam in a few weeks using DPA 4023s (FOB) into various combinations of my R44, Sonosax SX-M2 and USBPre 2.  8 sets makes for 8 comps.

I have a set of single female end to dual male end cables already made if you want to borrow them. XLRs on both ends, but you could use adaptors if you want to run the 1/4" for the USBPre.

I'd love to but the materials are due in tomorrow.  Oh the cabling making fun!
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 29, 2010, 07:38:52 PM
Mic in is xlr.   Line in is 1/4.  Consumer ins are rcas. 


The line in isn't XLR??  I'll be at Xmas jam, really want to see one of these. 

Anyone used one in the field?

Ran mine on Friday.   Had to run it mic in (phantom off) from my sonosax so it went thru the pres on both units.   Ordering cabling to run into the line-in section (1/4 TRS) which allows for a hotter (pro level) signal and bypasses the pres.   I've going to make a set of xlr splitters this weekend so I'll be able to run a few good comps (24/48) at Christmas Jam in a few weeks using DPA 4023s (FOB) into various combinations of my R44, Sonosax SX-M2 and USBPre 2.  8 sets makes for 8 comps.

I have a set of single female end to dual male end cables already made if you want to borrow them. XLRs on both ends, but you could use adaptors if you want to run the 1/4" for the USBPre.

I'd love to but the materials are due in tomorrow.  Oh the cabling making fun!
Title: Re: Sound Devices USBPre 2
Post by: mepaca on November 29, 2010, 09:11:00 PM
Anyone used one in the field? 
I used mine for an acoustic jazz trio. It was amplified nylon sting guitar and acoustic bass with drums. I used Schoeps with mk4 caps ortf >
usbpre 2 > r-44 coax and d50 optical. The recordings sounded exceptional. I thought it sounded more open and better than my v2 > mini-me
combo.
Title: Re: Sound Devices USBPre 2
Post by: page on November 30, 2010, 02:26:31 AM
I wonder how the DAC stage in this sounds compared to other mid-upper level DACs (I'm considering dual usage, both recording, and in conjunction with my m901). Has anyone tried using it's headphone output as an audio interface via either spdif/toslink and not usb (so just feeding it 5v with the usb connection and not an audio signal from a PC)?

it's a rather versatile little device all things considered.
Title: Re: Sound Devices USBPre 2
Post by: datbrad on November 30, 2010, 02:02:29 PM
I wonder how the DAC stage in this sounds compared to other mid-upper level DACs (I'm considering dual usage, both recording, and in conjunction with my m901). Has anyone tried using it's headphone output as an audio interface via either spdif/toslink and not usb (so just feeding it 5v with the usb connection and not an audio signal from a PC)?

it's a rather versatile little device all things considered.

Grayson, You thinking of using one of these into a little bit bucket linked with your 722 so you can go 4 channel?
Title: Re: Sound Devices USBPre 2
Post by: bhadella on November 30, 2010, 02:20:03 PM
I had previously reported issues getting the USBPre 2 to work with my Edirol R44.   Found out the issue was entirely on the R44 side.   I've tested my USBPre 2 with another R44 with no issues.

My R44 is on its way back home from Edirol getting the coax in fixed.   During hardware testing they found nothing wrong.   During software diagnostic testing they found a glitch that killed to coax in.   Reflashed via diagnostic testing and it's back up and running.   Glad I didn't break it but was very weird.  1st time the tech had seen that issue.   

Title: Re: Sound Devices USBPre 2
Post by: page on November 30, 2010, 03:58:59 PM
I wonder how the DAC stage in this sounds compared to other mid-upper level DACs (I'm considering dual usage, both recording, and in conjunction with my m901). Has anyone tried using it's headphone output as an audio interface via either spdif/toslink and not usb (so just feeding it 5v with the usb connection and not an audio signal from a PC)?

it's a rather versatile little device all things considered.

Grayson, You thinking of using one of these into a little bit bucket linked with your 722 so you can go 4 channel?

Bingo.

I thought about the 744, but I would have to get an absolutely awesome deal on one to do 4ch in a single box anymore. I've encountered enough situations where having 2 boxes running separately was more of a benefit that gives me pause in considering a single box option, but it doesn't happen frequently enough to go out of my way for and just get another 722. I'll keep my 722 as the go-to machine and use the usbpre2 when I need it and just link the clocks (or not, depending on what the situation presents). If I can use it with for playback with the m901 (or in place of) then it becomes much more appealing.
Title: Re: Sound Devices USBPre 2
Post by: illconditioned on November 30, 2010, 05:02:59 PM
USB POWER!   Finished.  Takes power from 9 volt DVD battery.  Steps it down from 9 volts to 5 volts on the USB plug.  Has pass thru 9 volts.  This set up would allow me to power my MP-2 and the USBPre2 at the same time.  For this one I decided to forgo a polarity switch and the hot swap.  Mostly because I don't really need them.  The SD preamps don't draw a lot of power and I expect to get over 5 hour run times with both units on a single battery.   I already have a battery cord for Edirol units and I have a hot swap set up for my 680. 

Considering I had extra battery cable parts and I happen to have a few of them fancy gold strain reliefs too, my cash outlay was pretty low.  Probably about $12-15, plus my time.  To build it completely from scratch including cable you could probably do it for under $30.  It could also be done with plugs so that you could just stick it inline of your normal battery setup but the plugs run around $3 or $4 each.  There is still lots of room it you wanted to get fancy and includ on/off switch or polarity switch.  You could even put an led to show it's working if you wanted. 

First picture is finished and installed, A quick DOH! moment as I realized I miswired the pass thru.  Luckly an easy fix.  A look of the unit with CORRECT pass thru.  Then some hot glue to secure everything.  And the finished product.
Put a heatsink on the regulator if you are going to draw more than a few hundred milliamps.


  Richard

Title: Re: Sound Devices USBPre 2
Post by: datbrad on November 30, 2010, 11:08:38 PM
I wonder how the DAC stage in this sounds compared to other mid-upper level DACs (I'm considering dual usage, both recording, and in conjunction with my m901). Has anyone tried using it's headphone output as an audio interface via either spdif/toslink and not usb (so just feeding it 5v with the usb connection and not an audio signal from a PC)?

it's a rather versatile little device all things considered.

Grayson, You thinking of using one of these into a little bit bucket linked with your 722 so you can go 4 channel?

Bingo.

I thought about the 744, but I would have to get an absolutely awesome deal on one to do 4ch in a single box anymore. I've encountered enough situations where having 2 boxes running separately was more of a benefit that gives me pause in considering a single box option, but it doesn't happen frequently enough to go out of my way for and just get another 722. I'll keep my 722 as the go-to machine and use the usbpre2 when I need it and just link the clocks (or not, depending on what the situation presents). If I can use it with for playback with the m901 (or in place of) then it becomes much more appealing.

The Toslink out gives you more options on a small bit bucket to use. I think I would go for the little Sony as a bit bucket if I was building a rig based on this new USBPre2, if anything for the size.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 01, 2010, 01:23:42 PM
USB POWER!   Finished.  Takes power from 9 volt DVD battery.  Steps it down from 9 volts to 5 volts on the USB plug.  Has pass thru 9 volts.  This set up would allow me to power my MP-2 and the USBPre2 at the same time.  For this one I decided to forgo a polarity switch and the hot swap.  Mostly because I don't really need them.  The SD preamps don't draw a lot of power and I expect to get over 5 hour run times with both units on a single battery.   I already have a battery cord for Edirol units and I have a hot swap set up for my 680. 

Considering I had extra battery cable parts and I happen to have a few of them fancy gold strain reliefs too, my cash outlay was pretty low.  Probably about $12-15, plus my time.  To build it completely from scratch including cable you could probably do it for under $30.  It could also be done with plugs so that you could just stick it inline of your normal battery setup but the plugs run around $3 or $4 each.  There is still lots of room it you wanted to get fancy and includ on/off switch or polarity switch.  You could even put an led to show it's working if you wanted. 

First picture is finished and installed, A quick DOH! moment as I realized I miswired the pass thru.  Luckly an easy fix.  A look of the unit with CORRECT pass thru.  Then some hot glue to secure everything.  And the finished product.
Put a heatsink on the regulator if you are going to draw more than a few hundred milliamps.


  Richard

Yes the Regulator will have a heatsink on it, and a fairly substantial one too.  I learned that lesson trying to build the 18 to 12 volt step down.   I could not believe how much heat one of those little buggers could generate. 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 04, 2010, 02:48:18 PM
I finally had the chance to go out and run the pre!  I'm pulling the files onto the puter as we speak.  Recorded a three piece rock and roll band at a small bar.  Not super loud but I had to run the 15db pads on the preamp.  That kinda surprised me.  I also set it up to record via the spdif and analog xlr into my 680.  I'm very curious as if there is a difference in sound but I guess that is really for the 680 thread.  Initial impression very easy to use.  Ran the voltage regulator box for powering the USBPre2 & the DR-680 at the same time.  After about two hours there was still two lights on the dvd battery by the end of set break there was one light on.  So at that point I switched.  So it was about a 2.5 hour run time on one battery powering both units.  Not too bad considering it was two units draining it.  I am considering running the limiter next time, has anyone tried that yet?  The pre seems to have a fairly hot output too like the MP-2.   In hindsight I wish I had run the MP-2 for a set just to compare them.  Stay tuned for updates


I'll post some straight up mic samples with spdif/xlr.  The mics were at stage lip, about 7-8 feet from amps and drums.  I ran Toa KY's ORTF 22cm ~2.5' high. 
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 04, 2010, 06:22:50 PM
SOUND SAMPLE....ok lets hear what you got to say......................

here is the sample.  I picked a piece that has no vocals so it is just what the mics are picking up.  The mics were at stage lip, about 7-8 feet from amps and drums.  I ran Toa KY's ORTF 22cm ~2.5' high.  It's a small file so it will load up easily.  it contains both Spdif and XLR inputs.  see if you can tell which is which.  And there are more than two pieces to it.  The Spdif input is via a Zaolla silverline coax and the XLR input is via my own custom chopped down switchcraft gold xlr's with Gepco Bittree DPC AES/EBU 110 ohm cable.  I only adjusted levels to make them even, no normalization or anything else.   Let us know how many pieces you think there are and which is which.   I'll post the results below between the quotation marks, but in white text so you will need to change the text color to read it or just highlight it.

http://www.sendspace.com/file/jdf9wb







" the first ten seconds are digi input the second ten seconds are analog input and the rest is digi input.  "
Title: Re: Sound Devices USBPre 2
Post by: bhadella on December 06, 2010, 08:52:49 AM
Ran some comparisons between the a/d's of my R44 and USBPre 2 while being fed from my Sonosax SX-M2.   The USBPre 2 in my ears was a definite improvement over the R44.   In comparison, the lowend of the R44 seemed smeared and the decay of the cymbal hits was non-existent.   Another item of note, when running line-in (via the 1/4) the USBPre 2 knobs needed to be at 12:00 for unity.  Makes it very easy to know where they should be set.   So running line-in, you can attenuate the signal (15 dbs or so) and also apply gain (15 dbs or so). 
Title: Re: Sound Devices USBPre 2
Post by: page on December 06, 2010, 10:05:42 AM
Ran some comparisons between the a/d's of my R44 and USBPre 2 while being fed from my Sonosax SX-M2.   The USBPre 2 in my ears was a definite improvement over the R44.   In comparison, the lowend of the R44 seemed smeared and the decay of the cymbal hits was non-existent.   Another item of note, when running line-in (via the 1/4) the USBPre 2 knobs needed to be at 12:00 for unity.  Makes it very easy to know where they should be set.   So running line-in, you can attenuate the signal (15 dbs or so) and also apply gain (15 dbs or so).

Have a comparative sample of the same content from both ADCs?
Title: Re: Sound Devices USBPre 2
Post by: bhadella on December 06, 2010, 10:25:48 AM
Ran some comparisons between the a/d's of my R44 and USBPre 2 while being fed from my Sonosax SX-M2.   The USBPre 2 in my ears was a definite improvement over the R44.   In comparison, the lowend of the R44 seemed smeared and the decay of the cymbal hits was non-existent.   Another item of note, when running line-in (via the 1/4) the USBPre 2 knobs needed to be at 12:00 for unity.  Makes it very easy to know where they should be set.   So running line-in, you can attenuate the signal (15 dbs or so) and also apply gain (15 dbs or so).

Have a comparative sample of the same content from both ADCs?

Just fooling around taping my stereo.   After XMas Jam I'll have a bunch of comps.  Played around with my xlr splitter cables, they will make further comps very easy.
Title: Re: Sound Devices USBPre 2
Post by: page on December 06, 2010, 12:26:51 PM
Ran some comparisons between the a/d's of my R44 and USBPre 2 while being fed from my Sonosax SX-M2.   The USBPre 2 in my ears was a definite improvement over the R44.   In comparison, the lowend of the R44 seemed smeared and the decay of the cymbal hits was non-existent.   Another item of note, when running line-in (via the 1/4) the USBPre 2 knobs needed to be at 12:00 for unity.  Makes it very easy to know where they should be set.   So running line-in, you can attenuate the signal (15 dbs or so) and also apply gain (15 dbs or so).

Have a comparative sample of the same content from both ADCs?

Just fooling around taping my stereo.   After XMas Jam I'll have a bunch of comps.  Played around with my xlr splitter cables, they will make further comps very easy.

gotcha, I couldn't remember when the jam was. Thanks!
Title: Re: Sound Devices USBPre 2
Post by: bluntforcetrauma on December 09, 2010, 09:05:09 PM
this looks like a nice piece of equipment.  I was thinking of using such a unit with my MAC computer when i am mixing movies and need to put in commentary or other voice over work. For example, in my little world when making videos ( instructional and educational), I most often will use voice overs and commentary to already existing footage that i have shot in HD.
My charity at    themovementschool.org   which is also one of my links under my username is what I do. And so putting out videos and instructions, usually need additional voice work and was wondering if this pre is would be a good choice?
I have been using various mics like the rode NTG-2 and the shure sm7 for voice overs and just plugging mic into my sonosax>1/8 into MAC, but i am not in love with the quality. thanks again


Does anyone feel that this device would suite my needs?

please advise

thank you
Title: Re: Sound Devices USBPre 2
Post by: tracker on December 10, 2010, 08:36:38 PM
it sounds like it would suit your needs well, i too will be using it primarily for spoken word.

i know some voice over people that used the 1.5 for voice over work, and a couple of people on a voice actor's forum have expressed an interest as well.... plus i've heard people say SD's pre's are pretty damn decent for voice work.

i wouldnt know though as i have yet to hear SD pres,... although i guess i've probably heard them all over on tv and film.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on December 10, 2010, 09:52:38 PM
http://www.centrance.com/products/mp/

This may better suit your needs, but I don't want to discourage you from the USB PRE2 because it will have more gain and that may be necessary sometimes.
Title: Re: Sound Devices USBPre 2
Post by: bluntforcetrauma on December 10, 2010, 10:40:26 PM
http://www.centrance.com/products/mp/

This may better suit your needs, but I don't want to discourage you from the USB PRE2 because it will have more gain and that may be necessary sometimes.

thank you so much, i do remember seeing that before and i totally forgot about it, How is the Micport pro different than the USBPre 2?  What i mean is that in what environments would i need more gain?  If i am doing vocals( commentary) or voice over, and the occasional recording, I am having a bit of trouble understanding the difference other than options between the 2.  I am not tech savvy when it comes to MIC>pre?>computer for adding additional audio.
My goal is to make the - commentary part stand out in front ( sounding), my projects tend to sound a bit distant and a bit muddy-when i am doing voice over or commentating.  I want it to be brighter and be out in the front sounding, not like i am talking thru a hat.

thanks in advance
Title: Re: Sound Devices USBPre 2
Post by: page on December 13, 2010, 12:04:33 PM
So looking at the block diagram; it looks like in standalone mode you can feed it an optical signal, and get a coax out (or vice-versa). Anyone tested to see if it's bit perfect?
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 14, 2010, 04:13:53 PM
So looking at the block diagram; it looks like in standalone mode you can feed it an optical signal, and get a coax out (or vice-versa). Anyone tested to see if it's bit perfect?

Niot near my gear right now but I thought there was some line item that optical took preference if both signal are there or something like that.  Should be in the manual....that might only be in reference to inputs not sure
Title: Re: Sound Devices USBPre 2
Post by: page on December 14, 2010, 04:15:51 PM
So looking at the block diagram; it looks like in standalone mode you can feed it an optical signal, and get a coax out (or vice-versa). Anyone tested to see if it's bit perfect?

Niot near my gear right now but I thought there was some line item that optical took preference if both signal are there or something like that.  Should be in the manual....that might only be in reference to inputs not sure

I thought about that, I think it's in reference to inputs. Seems like they would have had to do work to get the outputs to shut off just because an input was detected elsewhere and I suspect their efforts were targeted elsewhere. Quite possible, but I don't think so.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 14, 2010, 04:30:21 PM
Try asking Nic from SD, he is awesome about finding the answer to my weird questions.....and believe me I had a few :laugh:
Title: Re: Sound Devices USBPre 2
Post by: page on December 14, 2010, 09:37:00 PM
Try asking Nic from SD, he is awesome about finding the answer to my weird questions.....and believe me I had a few :laugh:

I'll bop over to the SD forums tomorrow during lunch and mention something. Thanks.
Title: Re: Sound Devices USBPre 2
Post by: taperj on December 16, 2010, 12:41:31 AM
Try asking Nic from SD, he is awesome about finding the answer to my weird questions.....and believe me I had a few :laugh:

I just sent in my Mixpre for a checkup yesterday and spoke with Nic at length about the intricacies and differences between the 744 and 788 preamps etc while I had him on the phone. He's definitely a great resource and he was super cool about my admittedly "oddball" questions as well.
Title: Re: Sound Devices USBPre 2
Post by: braweave on December 19, 2010, 10:30:45 PM
Has anyone used the USBPre2 with the Tekkeon 3450 battery? If so, how long does it last?

Thanks
Title: Re: Sound Devices USBPre 2
Post by: page on December 20, 2010, 12:04:09 AM
Has anyone used the USBPre2 with the Tekkeon 3450 battery? If so, how long does it last?

Thanks

if nothing else, then 5v would be 10000mah (assuming full capacity can be utilized). Figure it draws at max an amp constant would make it what, just about festival capable at 100 hours? Even knocking off 1/4th of the capacity to be conservative and staying at a full amp constant draw gets you at least 70 hours.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 20, 2010, 04:20:32 PM
I ran my USBPre2 and my MP-2 off a (V 5400 mAh battery and the voltage converter I made.   After about 5 hours I still had one light on the dvd battery.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 12, 2011, 02:26:10 PM
Just adding a link in about doing battery power with a voltage regulator in line.  I have a little bug in the setup that I am working out.  Just in case anyone else was planning on using the 9v DVD battery setup, you should check this out, Kirk

http://taperssection.com/index.php?topic=141902.0

Otherwise things are sounding good.  I have found that I needed to run pads on in the USBPre2 when I am running mics on stage at loud rock shows.  Other than that it is pretty darn simple to run.  I also had a chance to run it sync to another spdif clock, super easy to do.
Title: Re: Sound Devices USBPre 2
Post by: sunjan on January 14, 2011, 05:36:41 AM
The ASIO driver was announced at NAMM yesterday:
http://syphaonline.com/SYPHAnewsitems2011/SYPHAnews20110113-01.html

Quote
Sound Devices upgrades USBPre 2 interface with addition of ASIO Driver (13/1/2011)

Sound Devices is taking its USBPre 2, an all-new version of its popular USBPre computer audio interface, to the next level by adding Windows OS ASIO drivers along with its built-in, class-compliant drivers. The two-channel USBPre 2 offers professionals a powerful, yet easy-to-use, portable interface to interconnect audio sources to both Mac OS and Windows computers over USB. With the addition of ASIO, the USBPre 2 can now connect to popular DAW software platforms in Windows, such as ProTools 9.

“The benefit of class-compliant drivers means simplicity for customers,” says Paul Isaacs, principal applications engineer, Sound Devices. “Out of the box, the USBPre 2 works in Mac OS, Windows and Linux environments. We recognized the need for ASIO drivers for Windows, as it unlocks high sampling rates that are already available in Mac OS and enables users to take advantage of the high performance of the USBPre 2.”

The USBPre 2 is ideal for a broad range of applications including voiceover recording, reference playback and monitoring, and test and measurement. USBPre 2 uses the same extended-bandwidth, low-noise microphone preamplifiers and digital converters as Sound Devices award-winning 7-Series Digital Recorders.

The class-compliant, plug-and-play device accepts mic level, line level, consumer line level and SPDIF digital (coaxial or TOSLINK) inputs. Its microphone preamplifiers have selectable analog limiters, high-pass filters, 48 V phantom power and high-resolution LED meters. Because the USBPre 2 draws its power solely from the computer’s USB port, no additional power source is required.

Sound Devices designed the USBPre 2 for both reference quality input and output. Its balanced XLR outputs offer superior rejection to interference and are switch-selectable between mic or line level. Additionally, a consumer RCA-type output is available for connection to unbalanced inputs. Its headphone amplifier easily drives full-sized headphones with extensive, clean gain.

With its unique stand-alone mode, the USBPre 2 functions as a two-channel microphone preamplifier with analog, digital and headphone outputs. Stand-alone mode is perfect for applications that require an easy-to-use, quality microphone preamplifier. A built-in high-resolution LED level meter helps further facilitate these types of applications.

The USBPre 2, as with all Sound Devices products, is designed to withstand the physical and environmental extremes of field production. Its chassis is made from aluminum for superior durability and weight reduction.

ASIO drivers will be available for all registered users of the USBPre 2 beginning in February 2011.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on January 14, 2011, 11:58:39 PM
So it has the same pre's as my 722 :) I guess it would be a waste of money to run USBPre2>7xx :P
Title: Re: Sound Devices USBPre 2
Post by: SClassical on January 15, 2011, 02:33:07 AM
Sound Devices say the preamp is not "exactly" the same because one runs on lower voltage than the other - but VERY similar. But the AD is exactly the same.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on January 15, 2011, 03:26:03 AM
Sound Devices say the preamp is not "exactly" the same because one runs on lower voltage than the other - but VERY similar. But the AD is exactly the same.

WOWZA! Then this new USBPre2 is going to be a HOT ITEM for people wanting the 7xx sound but w/ out shelling out BIG CASH!!!! I'd buy a USBPre2 and a small/cheap 24-bit bucket and be SET!!!!
Title: Re: Sound Devices USBPre 2
Post by: page on January 15, 2011, 02:22:48 PM
Sound Devices say the preamp is not "exactly" the same because one runs on lower voltage than the other - but VERY similar. But the AD is exactly the same.

WOWZA! Then this new USBPre2 is going to be a HOT ITEM for people wanting the 7xx sound but w/ out shelling out BIG CASH!!!! I'd buy a USBPre2 and a small/cheap 24-bit bucket and be SET!!!!

yeah, for our field uses it looks like a great little box, especially since you can gang one onto your 7xx and go 4 ch with it via spdif synching.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on January 15, 2011, 05:44:46 PM
Last night I ran a comp between the USBPre 2 a/d and Edirol R44 a/d by splitting the signal coming from my DPA 4023 > Sonosax SX/M2.   I'd like to share but would prefer to know in what form folks would like the files. 

I'd like to stick with 24/48 files as it would eliminate the effects of dither and resample to 16/44.   Do you guys prefer a single wave where the source switches at an interval (20 seconds, 1 minute, etc) or would you guys prefer separate tracks for the two sources?   

FYi: My next time out, I will do a comp of my Sonosax pre-amp vs the USBPre 2 preamp. 
Title: Re: Sound Devices USBPre 2
Post by: page on January 15, 2011, 06:28:16 PM
Last night I ran a comp between the USBPre 2 a/d and Edirol R44 a/d by splitting the signal coming from my DPA 4023 > Sonosax SX/M2.   I'd like to share but would prefer to know in what form folks would like the files. 

I'd like to stick with 24/48 files as it would eliminate the effects of dither and resample to 16/44.   Do you guys prefer a single wave where the source switches at an interval (20 seconds, 1 minute, etc) or would you guys prefer separate tracks for the two sources?   

FYi: My next time out, I will do a comp of my Sonosax pre-amp vs the USBPre 2 preamp.

Especially if they are on the same clock, that way we can switch back and forth on our own and check. In audacity, it's really easy to set it up to do instant switches for comparison. Thanks!
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 15, 2011, 06:29:09 PM
You don't need to split the signal just run the digi and analog out of the USBPre2.  The pre will do the splitting for you ;D

When I did a comp of the DR-680 and USBPre2 A/D sections I did it as a blind test with different sections spliced together.   I could not hear a difference between the two units. 
Title: Re: Sound Devices USBPre 2
Post by: bhadella on January 15, 2011, 06:39:11 PM
You don't need to split the signal just run the digi and analog out of the USBPre2.  The pre will do the splitting for you ;D

But then I'd be allowing the USBPre 2 to "color" the signal on the analog out.   Not a true comparison.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 15, 2011, 06:53:46 PM
Maybe I'm confused but if you run signal into the ISBPre2 aren't you going through the preamps anyway?  I don't have the flow chart in front of me but I believe it hits the preamps then goes to the A/D section on both analog(rca) and mic(xlr) inputs.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on January 15, 2011, 07:20:17 PM
Maybe I'm confused but if you run signal into the ISBPre2 aren't you going through the preamps anyway?  I don't have the flow chart in front of me but I believe it hits the preamps then goes to the A/D section on both analog(rca) and mic(xlr) inputs.

I agree.   That's why I wanted to split the signal before hitting the USBPRe 2 so that I would negate the effects of the preamps on the signal coming from my Sonosax.   I wanted to compare whether having the USBPre 2 as a line-level a/d converter makes a more pleasing recording to my ear when compared to not using it at all. 
Title: Re: Sound Devices USBPre 2
Post by: bhadella on January 15, 2011, 11:40:37 PM
Here's the folder for the gear comp.  Note that the files are 24/48 flacs. 

http://www.mediafire.com/?z8tc0fyvy2lb3

Details of the text file I included:

"Here's my comp of the USBPre 2 a/d vs the R44 a/d.

Source file is from the 01/14/2011 Railroad Earth concert at The Orange Peel, Asheville, NC.  The song is Walk Beside Me. 
I ran a cable splitting the signal from my DPA 4023 (5' LOC at FOH, 8' up, DIN) > Sonosax SX-M2 source to both the USBPre 2 and R44.   
Both a/ds were set to unity gain on the R44 (+4db on outer ring, 12:00 on inner ring) and USBPre 2 (line in via 1/4TS, 12:00 on gain).
Post processing was only adding gain till the Average RMS Power of each channel was -16.50 dB.
I will post the sources in a few days but feel free to PM or email me for the results.

Brian Hadella
bhadella@yahoo.com
01/15/2011"
Title: Re: Sound Devices USBPre 2
Post by: Fitz on January 19, 2011, 12:42:42 AM
Newbie question:
Rather then creating a new topic I would like to ask the respondants of this thread;

"If you had $650 to spend on a preamp would you choose a used Grace Design V2 or a new Sound Devices USBPre 2?"

Neumann SKM184 > preamp > Sony PCM-D50

All opinions welcome.
Title: Re: Sound Devices USBPre 2
Post by: sunjan on January 19, 2011, 03:25:41 AM
Interesting question. The obvious advantage of the USBPre2 is built in ADC, allowing you to go optical-in on the D50. In your case, this might be moot since the Sony AD is supposed to be good anyway, but that makes your rig more future proof in case you'll upgrade to another recorder with digital input later on.
Another advantage is factory warranty if you buy new gear.

I haven't read all the feedback on the USBPre2 yet, is it able to power even the most power-hungry mics on a 5V USB battery? Powering on the V2 is suppposed to be more flexible, with adjustable voltage requirements.

The USBPre2 has a slightly smaller footprint, but it shouldn't make a difference running open.

I guess it boils down to the sound flavor in the end. I haven't heard enough of either pre to determine the differences. I leave this to more experienced users.
Title: Re: Sound Devices USBPre 2
Post by: page on January 19, 2011, 09:45:43 AM
Newbie question:
Rather then creating a new topic I would like to ask the respondants of this thread;

"If you had $650 to spend on a preamp would you choose a used Grace Design V2 or a new Sound Devices USBPre 2?"

Neumann SKM184 > preamp > Sony PCM-D50

All opinions welcome.

I'd personally get the usbpre2 for the following reasons:

- bigger feature set that meets my needs/interests more than just an analog pre-amp. (digi out, plus ability to operate as a soundcard when not taping)
- I'm happy with SD pre-amps and ADCs.
- I already have a tekkeon battery which provides power for something and usb power (that I trust to work) where as I'd need a new battery to provide the 6v that the V2 needs.
Title: Re: Sound Devices USBPre 2
Post by: Todd R on January 19, 2011, 11:17:43 AM
Up front I'd say you probably should have started a new topic on this.  I'm thinking that people seeing your post have read through 18 pages of posts about the USBPre, meaning those of us reading your post are probably pretty interested in the USBPre (survey selection bias).

That said, I've run a Grace Lunatec preamp for something like 6 years.  Faced with wanting to get rid of my PSP2 and get a preamp+AD to feed the digital channels of my 680, I ended up getting a Lunatec V3, even though it costs more than a USBPre (and V2).

Whether to choose a V2 over USBPre, tough call, depends what you want.  The D50 has a nice analog input stage, but still it is nice to use the digital input.  So functionally, the USBPre has more, so the question comes down to what preamp sound/flavor you like.

The USBPre supposedly has an analog gain stage (preamp) very similar to the 702/722, and the ADC is supposed to be exactly the same.  I owned a V3 and 702/722 for a pretty good while, and have used that combo or mics straight into the 702/722 quite a bit.  Though the 702 preamp is definitely good, I always preferred the Lunatec preamp.

So for me, I think I will like the Lunatec preamp sound better than the USBPre sound.  On that basis, I would probably chose the V2 over the USBPre.  Its only the added digital out functionality of the USBPre that makes me lean towards it.  To get that added functionality, I actually went with the Lunatec V3 over the USBPre, even though it was more expensive.
Title: Re: Sound Devices USBPre 2
Post by: page on January 19, 2011, 11:53:58 AM
Up front I'd say you probably should have started a new topic on this.  I'm thinking that people seeing your post have read through 18 pages of posts about the USBPre, meaning those of us reading your post are probably pretty interested in the USBPre (survey selection bias).

very valid point, and I agree.


Its only the added digital out functionality of the USBPre that makes me lean towards it.  To get that added functionality, I actually went with the Lunatec V3 over the USBPre, even though it was more expensive.


The only other function I can see worth mentioning is the syncing ability.  You can clock a usbpre2 against anything that will send a spdif signal, the V2 leaves you with mixing in post and doing the stretch/math. It's sort of a specialized function, and I don't know how often Fitz would use it.
Title: Re: Sound Devices USBPre 2
Post by: Todd R on January 19, 2011, 12:18:50 PM
Yes, I should have made clear -- I went through what mattered to me in my decision-making, not the "selling" points of a USBPre overall.  It really looks to be a very nice piece of gear with a lot of cool functionality.  That clock sync is one of them!  Someone around here was using that feature to clock sync two DR680's for 16ch recording -- far more than I ever need, but very cool nevertheless.

Between the cost, size, computer hook up capability, standalone capability, clock syncing, digital out (coax and optical), analog out, low power draw, etc, the USBPre has a lot going for it.  I almost got one just because I'm a gear slut and wanted to try it out, but I just couldn't keep myself from returning to Grace pre's.
Title: Re: Sound Devices USBPre 2
Post by: Fitz on January 19, 2011, 07:35:54 PM
Thanks for the thoughts.  An noted with respect to the new thread creation..

Will think about this one a bit more.

Title: Re: Sound Devices USBPre 2
Post by: mepaca on January 20, 2011, 09:24:48 AM
Newbie question:
Rather then creating a new topic I would like to ask the respondants of this thread;

"If you had $650 to spend on a preamp would you choose a used Grace Design V2 or a new Sound Devices USBPre 2?"

Neumann SKM184 > preamp > Sony PCM-D50

All opinions welcome.

Hello- I have both units. I would go for the usbpre 2 for the following reasons.
1) It is a brand new guaranteed unit.
2) excellent a/d and d/a conversion
3) the plethora of i/o options
4) powering from any usb source
5) the ability to use it as an excellent computer interface
6) 80 db of clean gain with built in pads
7) excellent metering
8) built in outstanding headphone amp
9) most importantly, superior sound that easily rivals the v2
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on January 20, 2011, 01:08:07 PM
Newbie question:
Rather then creating a new topic I would like to ask the respondants of this thread;

"If you had $650 to spend on a preamp would you choose a used Grace Design V2 or a new Sound Devices USBPre 2?"

Neumann SKM184 > preamp > Sony PCM-D50

All opinions welcome.

Hello- I have both units. I would go for the usbpre 2 for the following reasons.
1) It is a brand new guaranteed unit.
2) excellent a/d and d/a conversion
3) the plethora of i/o options
4) powering from any usb source
5) the ability to use it as an excellent computer interface
6) 80 db of clean gain with built in pads
7) excellent metering
8) built in outstanding headphone amp
9) most importantly, superior sound that easily rivals the v2

I would LOCVE to hear a USBPre2 recording! AND a comp of the V2/USBPre2 ;D

And I would like to hear a comp of the PSP2 vs. LB w/ IN/OUT Tformers
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on January 21, 2011, 12:39:20 PM
I'm curious to know if anyone has been running the USBPre2 with the Sony D50 and whether you're happy (or even ecstatic) with the results.
Title: Re: Sound Devices USBPre 2
Post by: acidjack on January 21, 2011, 05:39:48 PM
Any thoughts on the USBPre2 vs. the Oade 248?

Yes, I'm looking at Focker's 248 here:  http://taperssection.com/index.php?topic=142313.0

Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 21, 2011, 06:02:11 PM
Don't really know anything about a 248, does it do 24 bit?  New....80dB of gain....USB ability. Like I said I don't know anything about a 248 but for the same money I'd get the SD preamp.
Title: Re: Sound Devices USBPre 2
Post by: mepaca on January 21, 2011, 10:43:54 PM
I'm curious to know if anyone has been running the USBPre2 with the Sony D50 and whether you're happy (or even ecstatic) with the results.
I run it 24/96 optical into the d50 and coax into the r-44 at the same time. Last night I also ran analog out into an hhb cd recorder
to give the artist a cd copy to take with him. Yes I am ecstatic with the results. The sound going digital into the d50 will be identical to the
sound going into any other 24/96 recorder with a digital input. Make sure the usbpre 2 has the 1.01 firmware version.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 24, 2011, 01:39:46 PM
New drivers & ASIO drivers are up:
 Whoops sorry the link send you to the USBPre drivers not the Pre2 drivers
Title: Re: Sound Devices USBPre 2
Post by: rastasean on January 24, 2011, 02:39:39 PM
New drivers & ASIO drivers are up:
 Whoops sorry the link send you to the USBPre drivers not the Pre2 drivers

windows pre2 drivers should be released next month.
http://www.digitalproductionbuzz.com/2011/01/13/sound-devices-upgrades-usbpre-2-interface-addition-asio-driver/

The only thing I wish the pre2 had was an off switch but since it only uses 5volts, its no big deal.
Title: Re: Sound Devices USBPre 2
Post by: page on January 24, 2011, 03:29:37 PM
New drivers & ASIO drivers are up:
 Whoops sorry the link send you to the USBPre drivers not the Pre2 drivers

windows pre2 drivers should be released next month.
http://www.digitalproductionbuzz.com/2011/01/13/sound-devices-upgrades-usbpre-2-interface-addition-asio-driver/

The only thing I wish the pre2 had was an off switch but since it only uses 5volts, its no big deal.

yeah, an on-off switch WC in/out, a bunch of luxeries would have been nice actually, but the functionality there makes it generally possible and they kept cost down. Not a knock on your comment, more like a "me too but I'm thankful."
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 24, 2011, 08:03:08 PM
So just more info for those interested.
With two condensers on the inputs, gains at a healthy level and headphones with headphone gain at a normal level, you can expect between 175mA and 275mA of draw(approximately). 

I asked in order to verify voltages used on a voltage regulator.  They also said it could max at 500 mA, but as you see that is unlikely.
Title: Re: Sound Devices USBPre 2
Post by: braweave on January 26, 2011, 08:21:39 PM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on January 26, 2011, 10:36:59 PM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

I have run a v2/v3/sonosax/m148 and now the 722 pre's, and I even ran a few of those preamps>722, and I must admit I preferred the 7xx pre's the best of all. They are a very neutral and IN YOUR FACE preamp, w/ TONS of detail, but still has a balanced sound overall. Now I'm going to try a Naiant LittleBox>722 and LB>R09/M10 and see if I like those combos. The LB has a warm sound to it, and since mine has both IN/OUT transformers, I'm SURE it will be a nice and clean sound but w/ an overall warmth that should HOPEFULLY pair nicely w/ my MBHO's :) I really hope I like the LB, because I'll be out about $500.00 if I dont like it since I'/ll have an R09 AND cables to sell. I shoulda just bought the V2 in the YS. huh? :P ;D 8)
Title: Re: Sound Devices USBPre 2
Post by: page on January 27, 2011, 10:53:39 AM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons. To me, the question is, will you be ok without the extra power supply or media options as (IMHO) that's the big difference between the two. The 702 can have 2 batteries and if you get a firewire ssd, it can record to 2 mediums simultaniously. The usbpre2 is a single point of failure. Now, I suspect a good 90% or more of the tapers out there work in the single point of failure realm, and there isn't anything wrong with that for the vast majority of gigs. It's just a question of what are you recording and how dependant you are on making sure you get a recording (like doing contract work for a band).
Title: Re: Sound Devices USBPre 2
Post by: braweave on January 27, 2011, 11:40:30 AM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons.

I thought about the usbpre2>pcm-d50 option. The only question I have is, do they make a right angle Optical cable? I would be running the usbpre2 in a bag and it would be sitting on its back (where the optical out is located.
Title: Re: Sound Devices USBPre 2
Post by: jbell on January 27, 2011, 11:43:50 AM
I grabbed a right angle optical cable of ebay recently for around $6 shipped!  Here is the seller I bought one from.

http://cgi.ebay.com/Right-angle-toslink-mini-plug-digital-optical-cable-/230575723759?pt=LH_DefaultDomain_0&hash=item35af6254ef

are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons.

I thought about the usbpre2>pcm-d50 option. The only question I have is, do they make a right angle Optical cable? I would be running the usbpre2 in a bag and it would be sitting on its back (where the optical out is located.
Title: Re: Sound Devices USBPre 2
Post by: page on January 27, 2011, 11:49:34 AM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons.

I thought about the usbpre2>pcm-d50 option. The only question I have is, do they make a right angle Optical cable? I would be running the usbpre2 in a bag and it would be sitting on its back (where the optical out is located.

I grabbed a right angle optical cable of ebay recently for around $6 shipped!  Here is the seller I bought one from.


I picked up 2 from them a month ago as well. Only place I've seen them offered without the use of adaptors.
Title: Re: Sound Devices USBPre 2
Post by: jbell on January 27, 2011, 11:58:48 AM
I might grab another one while they are still available.  ^-^
Title: Re: Sound Devices USBPre 2
Post by: sunjan on January 27, 2011, 03:00:27 PM
Bump for the RA optical cable!
I've been searching for these since my old one broke two years ago.
Googled all over the place, I thought they went out of production forever.
Everybody running optical gear should grab an extra cable here, you might not find them again.

Sorry about the threadjack, this got me excited!  ;D
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on January 27, 2011, 03:58:03 PM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons. To me, the question is, will you be ok without the extra power supply or media options as (IMHO) that's the big difference between the two. The 702 can have 2 batteries and if you get a firewire ssd, it can record to 2 mediums simultaniously. The usbpre2 is a single point of failure. Now, I suspect a good 90% or more of the tapers out there work in the single point of failure realm, and there isn't anything wrong with that for the vast majority of gigs. It's just a question of what are you recording and how dependant you are on making sure you get a recording (like doing contract work for a band).

I guess if it is only about a second battery then the ability of having two is an advantage.  The Draw of a USBpre2 is pretty low and you can get some good run times on a single external battery.  And you could always have a hotswap cable made easily enough to give the ability to use secondary batteries if needed so that's really not that big of a deal.  As for a "Single Point of failure"....what about any issue that are not battery related, they happen.  You mention recording to a second unit, in case there is a problem with the 702 right?  The USBPre2 can send out 3 different signals at once, optical, spdif and analog so you could actually be running three recorders off of it.  The example of using a second device feeding off a 702 recorder is still a "single point" of failure.  If the 702 box goes down then you can't record to anything right?  SO same thing with a choke point at the preamp.  That requires one piece of gear to feed others so there is no redundancy. So if you are looking for backup and you need redundancy then that would require two separate rigs in order to be failure proof.  And what about the mic(s) wouldn't that be the 1st thing in line and also a single point of failure.  I guess at some point you have to trust your gear OR run two completely separate rigs if the recording is that important.  I would think that if you are doing contracted work for anyone then AC power would be available, but maybe not.  So you could still get the Sound Devices preamp flavor without buying a 702 less money.  Of course the recorder will not be built like a tank but it can be done.  And since I don't really know I'm assuming that the 702 can hot swap batteries too. 
Title: Re: Sound Devices USBPre 2
Post by: Todd R on January 27, 2011, 05:05:51 PM
I guess at some point you have to trust your gear OR run two completely separate rigs if the recording is that important. 

 I find myself often doing this.  For most of the last decade as I've taped, I've run two recorders.  First with mini-disk due to the media swap, then with DATs since they always proved to be finicky and unreliable to me, then with the Nomad JB3 since hard-disk recording was so new to me in 2002.  I've just continued since then.

Now I'm either doing an easy two channel rig, or more than likely for the "bigger" shows I run two sets of mics, two preamps, and two recorders (one being the 680).  So I end up with the two sets of mics+preamps going into the 8ch 680, and then run a separate Sony D50 out of the aux 1/8" out from my littlebox.  That ends up being a fully independent rig at that point, with 2ch of mics, preamp, and recorder separate from the other set of mics>preamp>680.  I keep toying with the idea of getting an M10 so I don't have to take along the larger D50, but I have a hard time skipping the 2nd recorder precisely because adding that small recorder into the mix gives me a complete backup system.

Probably makes me a paranoid freak, esp since there are other tapers at almost all shows I record, but I can't help it. ::)
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on January 27, 2011, 09:47:16 PM
I guess at some point you have to trust your gear OR run two completely separate rigs if the recording is that important. 

 I find myself often doing this.  For most of the last decade as I've taped, I've run two recorders.  First with mini-disk due to the media swap, then with DATs since they always proved to be finicky and unreliable to me, then with the Nomad JB3 since hard-disk recording was so new to me in 2002.  I've just continued since then.

Now I'm either doing an easy two channel rig, or more than likely for the "bigger" shows I run two sets of mics, two preamps, and two recorders (one being the 680).  So I end up with the two sets of mics+preamps going into the 8ch 680, and then run a separate Sony D50 out of the aux 1/8" out from my littlebox.  That ends up being a fully independent rig at that point, with 2ch of mics, preamp, and recorder separate from the other set of mics>preamp>680.  I keep toying with the idea of getting an M10 so I don't have to take along the larger D50, but I have a hard time skipping the 2nd recorder precisely because adding that small recorder into the mix gives me a complete backup system.

Probably makes me a paranoid freak, esp since there are other tapers at almost all shows I record, but I can't help it. ::)

I'm going to be running 2 separate preamp/recorders here soon.

MBHO>722
MBHO>Lil'Box>R09

A quick question tho, do I need to provide PHANTOM POWER on BOTH the 722 AND the Lil'Box ??? Because I'd be running a splitter at the end of my mic bodies, correct? I'd really like to have the 722 vs. the Lil'Box>R09 sources to comp
Title: Re: Sound Devices USBPre 2
Post by: page on January 27, 2011, 10:04:15 PM
are there any comparisons between the usbpre2 and the 702/722 pre's out there?

I would love to hear this.

Im trying to decide between UsbPre2 > Bitbucket v.s. 702. From what I can tell It will cost me approx 350-500 more (depending on the route of bitbucket I go) If I go with the 702. However, If the UsbPre2 preamp is inferior to that of the 702 then it *may* be worth the extra.

havnt heard it, but I'm guessing is miniscule. I thought about a 702 to gang with my 722 for stuff and I've turned my attention just to the usbpre2>pcm-d50 combo for the same economic reasons. To me, the question is, will you be ok without the extra power supply or media options as (IMHO) that's the big difference between the two. The 702 can have 2 batteries and if you get a firewire ssd, it can record to 2 mediums simultaniously. The usbpre2 is a single point of failure. Now, I suspect a good 90% or more of the tapers out there work in the single point of failure realm, and there isn't anything wrong with that for the vast majority of gigs. It's just a question of what are you recording and how dependant you are on making sure you get a recording (like doing contract work for a band).

I guess if it is only about a second battery then the ability of having two is an advantage.  The Draw of a USBpre2 is pretty low and you can get some good run times on a single external battery.  And you could always have a hotswap cable made easily enough to give the ability to use secondary batteries if needed so that's really not that big of a deal.  As for a "Single Point of failure"....what about any issue that are not battery related, they happen.  You mention recording to a second unit, in case there is a problem with the 702 right?  The USBPre2 can send out 3 different signals at once, optical, spdif and analog so you could actually be running three recorders off of it.  The example of using a second device feeding off a 702 recorder is still a "single point" of failure.  If the 702 box goes down then you can't record to anything right?  SO same thing with a choke point at the preamp.  That requires one piece of gear to feed others so there is no redundancy. So if you are looking for backup and you need redundancy then that would require two separate rigs in order to be failure proof.  And what about the mic(s) wouldn't that be the 1st thing in line and also a single point of failure.  I guess at some point you have to trust your gear OR run two completely separate rigs if the recording is that important.  I would think that if you are doing contracted work for anyone then AC power would be available, but maybe not.  So you could still get the Sound Devices preamp flavor without buying a 702 less money.  Of course the recorder will not be built like a tank but it can be done.  And since I don't really know I'm assuming that the 702 can hot swap batteries too.

Lots of valid points, I'm just looking at what I've experienced as the two failures that are most likely; power and media. The 702 can send to a CF card and external hdd (much like my 722's internal and cf card) so if one croaks, the other keeps going. It's actually this feature that allows me to run the 722 in peace; I dislike hdd recorders. Similarly, there is one battery and on the 7 series, if the external fails, it properly routes to the other one without interruption. Is that worth the extra $400-700 (depending on whether you count the D50 in the cost)? Probably not since I already have a 722 as the "daily-driver", and even without it, I'd still be pressed since you're right, SD gear is built sort of like a small tank. What makes me paranoid is doing a location recording for a band, and at the end of the show saying "sorry guys, my stuff died" because that's embarrassing. Yes, my mics could go, the pre-amps in the 7 series could go, any number of other things could go, but it's much less likely in my experience compared to the stuff that SD has redundancy features for.
Title: Re: Sound Devices USBPre 2
Post by: johnw on January 28, 2011, 07:08:44 PM
Bump for the RA optical cable!
I've been searching for these since my old one broke two years ago.
Googled all over the place, I thought they went out of production forever.
Everybody running optical gear should grab an extra cable here, you might not find them again.

Sorry about the threadjack, this got me excited!  ;D

went to grab one and they're now sold out. Don't need one at all but these are very hard to find!
Title: Re: Sound Devices USBPre 2
Post by: page on February 13, 2011, 12:43:11 AM
Can anyone verify if there is a power-pop through either of the headphone outs or xlr outs when power is terminated?
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on February 13, 2011, 02:29:18 PM
Not positive but I do believe that there is a pop/snap when you unplug power and still have mics plugged in.  I seem to remember that happening when I powered down the USBPre2 with my deck still recording.

RIGHT ANGLE OPTICAL cords back again:
http://cgi.ebay.com/Right-angle-toslink-to-mini-plug-digital-optical-cable_W0QQitemZ230583087187QQcategoryZ137919QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D10%26pmod%3D230575723759%26ps%3D63%26clkid%3D7063842521268406834
Title: Re: Sound Devices USBPre 2
Post by: page on February 13, 2011, 03:27:31 PM
Not positive but I do believe that there is a pop/snap when you unplug power and still have mics plugged in.  I seem to remember that happening when I powered down the USBPre2 with my deck still recording.

In a lot of ways, I'd expect that. I'm curious on a playback end. I'm thinking about either using it as a DAC or a DAC/headamp and replace my headamp with the added benefit of being able to use it in recording.
Title: Re: Sound Devices USBPre 2
Post by: johnw on February 13, 2011, 05:12:38 PM
RIGHT ANGLE OPTICAL cords back again:
http://cgi.ebay.com/Right-angle-toslink-to-mini-plug-digital-optical-cable_W0QQitemZ230583087187QQcategoryZ137919QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D10%26pmod%3D230575723759%26ps%3D63%26clkid%3D7063842521268406834

nice! got one this time.
Title: Re: Sound Devices USBPre 2
Post by: AB52 on February 13, 2011, 08:42:49 PM
Anyone actually tried it with the Tascam 680 which I believe has a spdif input for tracks 7 and 8?

Between that and Bushman modding the Tascam unit - it is very tempting.

Best,
AB
Title: Re: Sound Devices USBPre 2
Post by: tracker on February 13, 2011, 08:57:26 PM
on custom inear monitors, there is a click/pop when unplugging and plugging in but its not that stupidly loud unlike my previous ultralite.

this was with no mics plugged in.

Title: Re: Sound Devices USBPre 2
Post by: page on February 13, 2011, 10:05:01 PM
on custom inear monitors, there is a click/pop when unplugging and plugging in but its not that stupidly loud unlike my previous ultralite.

this was with no mics plugged in.

plugging in the power (so powering on) or plugging in the IEMs?
Title: Re: Sound Devices USBPre 2
Post by: tracker on February 13, 2011, 10:08:52 PM
sorry,... ::)

plugging in and unplugging the usb cable so powering up and down.
Title: Re: Sound Devices USBPre 2
Post by: page on February 13, 2011, 10:46:38 PM
sorry,... ::)

plugging in and unplugging the usb cable so powering up and down.

ah, thanks for the clarification! My 901 has a stupidly loud power off pop if it's locked onto a digital signal or in analog mod (digi-mod without a lock yields silence...)
Title: Re: Sound Devices USBPre 2
Post by: rastasean on February 13, 2011, 10:53:51 PM
Anyone actually tried it with the Tascam 680 which I believe has a spdif input for tracks 7 and 8?

Between that and Bushman modding the Tascam unit - it is very tempting.

Best,
AB

There is a comp between the DR680 and usbpre2 but I cannot locate it. I believe it was done by Kirkd. Maybe you can find it. ;)

However, there is also this comp between the usbpre2 & the r44 which also has digi inputs:
http://taperssection.com/index.php?topic=142208.0
Title: Re: Sound Devices USBPre 2
Post by: page on February 13, 2011, 10:58:21 PM
Anyone actually tried it with the Tascam 680 which I believe has a spdif input for tracks 7 and 8?

Between that and Bushman modding the Tascam unit - it is very tempting.

Best,
AB

There is a comp between the DR680 and usbpre2 but I cannot locate it. I believe it was done by Kirkd. Maybe you can find it. ;)

However, there is also this comp between the usbpre2 & the r44 which also has digi inputs:
http://taperssection.com/index.php?topic=142208.0

I know what your talking about with Kirk's, and I can't locate it either, but the difference was that the the edirol/SD one was focused on the ADC while (I thought) Kirk's was on both pre-amp and ADC.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on February 13, 2011, 11:17:40 PM
http://taperssection.com/index.php?topic=141206.0

This was using the SD preamps and then comparing the A/D sections of the SD VS the 680.  I guess in reality it did involve the 680 preamps to a small degree. 


I bought this unit specifically for the DR-680.  Although I would now also consider using a Tascam US-600/800 for the price.  The specs look pretty good and it can be used as a DI on channels 1 & 2.
  After doing a little more in depth reading  the Tascam US 800 is NOT something that I would want to be using.  I like the Di application but it is too computer based IMHO for field type use.But the USBPre2 is just such a solid unit with a great feature set. 
Title: Re: Sound Devices USBPre 2
Post by: pesciolino on February 15, 2011, 12:44:28 PM
do you think this guy will work for standalone power?

http://www.lenmar.com/Web/ProductDetails.aspx?ProductID=PPU2400B

Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on February 15, 2011, 02:09:37 PM
Yeah that should work.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on February 17, 2011, 07:48:41 AM
Yeah that should work.

What about this?

http://www.amazon.ca/gp/product/B003XI6LZO/ref=s9_simh_gw_p23_d1_i5?pf_rd_m=A3DWYIK6Y9EEQB&pf_rd_s=center-5&pf_rd_r=0FYV3BANX9DDRJWPG1VN&pf_rd_t=101&pf_rd_p=463383571&pf_rd_i=915398
Title: Re: Sound Devices USBPre 2
Post by: page on February 17, 2011, 10:35:31 AM
Yeah that should work.

What about this?

http://www.amazon.ca/gp/product/B003XI6LZO/ref=s9_simh_gw_p23_d1_i5?pf_rd_m=A3DWYIK6Y9EEQB&pf_rd_s=center-5&pf_rd_r=0FYV3BANX9DDRJWPG1VN&pf_rd_t=101&pf_rd_p=463383571&pf_rd_i=915398

not unless there is a usb out on it. I saw a usb in, but it looks like it has a dock replacement for an out connector.

Look, the specs for what you should look for in powering this is something that will deliver 5v, 500ma, up to 1amp ("usb power" spec) and has a capacity that is at least 1500-2000mah for any decent run time. It will be easier if it has a usb out plug, but technically if you're skilled with a solder gun and want to make your own connecting cable then have at it, but if you have questions about whether a battery will work, then I don't suggest it. You're looking at around $40-60 for a decent battery which is paltry compared to the $700 you'll spend on the box.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on February 17, 2011, 11:15:52 AM
Yeah that should work.

What about this?

http://www.amazon.ca/gp/product/B003XI6LZO/ref=s9_simh_gw_p23_d1_i5?pf_rd_m=A3DWYIK6Y9EEQB&pf_rd_s=center-5&pf_rd_r=0FYV3BANX9DDRJWPG1VN&pf_rd_t=101&pf_rd_p=463383571&pf_rd_i=915398

not unless there is a usb out on it. I saw a usb in, but it looks like it has a dock replacement for an out connector.

Look, the specs for what you should look for in powering this is something that will deliver 5v, 500ma, up to 1amp ("usb power" spec) and has a capacity that is at least 1500-2000mah for any decent run time. It will be easier if it has a usb out plug, but technically if you're skilled with a solder gun and want to make your own connecting cable then have at it, but if you have questions about whether a battery will work, then I don't suggest it. You're looking at around $40-60 for a decent battery which is paltry compared to the $700 you'll spend on the box.

Thanks for the info.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on February 20, 2011, 05:53:31 PM
I just completed a 3 day run of comparisons between my Sonosax SX-M2 preamp and the Sound Devices USBPre 2.   The source is Umphreys McGee recorded in three different venues using DPA 4022 mics setup DFC at FOH.  Mics were in the DIN configuration approximately 8' up.  I split the signal coming from the mics to both preamps.  Phantom power was provided by the Sonosax.  I've uploaded the 16 bit filesets to the archive where you can download them.  Gain was set to peak around -3 dbs, post processing included adding gain till both sources had the same RMS.   On the 1st and 3rd nights, I used the a/d function on the USBPre 2 in addition to the preamp.  On the 2nd night, I ran analog in to the R44 (set at unity). 


02/16/11 - The Music Farm, Charleston, SC   
http://www.archive.org/details/um2011-02-16.usbpre2.flacf16
http://www.archive.org/details/um2011-02-16.sax.flacf16

02/17/11 - The Orange Peel, Asheville, NC
http://www.archive.org/details/um2011-02-17.usbpre2.flacf16
http://www.archive.org/details/um2011-02-17.sax.flacf16

02/19/11 - The Fillmore, Charlotte, NC
http://www.archive.org/details/um2011-02-19.usbpre2.flacf16
http://www.archive.org/details/um2011-02-19.sax.flacf16

I'd love to get some feedback on how everyone feels the two pre-amps compare. 

Title: Re: Sound Devices USBPre 2
Post by: Fitz on March 06, 2011, 08:45:02 PM
I just completed a 3 day run of comparisons between my Sonosax SX-M2 preamp and the Sound Devices USBPre 2.   The source is Umphreys McGee recorded in three different venues using DPA 4022 mics setup DFC at FOH.  Mics were in the DIN configuration approximately 8' up.  I split the signal coming from the mics to both preamps.  Phantom power was provided by the Sonosax.  I've uploaded the 16 bit filesets to the archive where you can download them.  Gain was set to peak around -3 dbs, post processing included adding gain till both sources had the same RMS.   On the 1st and 3rd nights, I used the a/d function on the USBPre 2 in addition to the preamp.  On the 2nd night, I ran analog in to the R44 (set at unity). 
I'd love to get some feedback on how everyone feels the two pre-amps compare.

I listened to "Phil's Farm" from the first night in side by side comparision.  Couple thoughts. 
 - The sound on the high end seem slightly crisper with the SD USBPre2 versus the Sonsax appears to have a fuzzy or have a blurred edge at the highend (slightly muted)
 - The audiance chatter in the first 28seconds seem more prominant in Sonsax while the SD USBPre2 seems to accept the band over the audiance.. which is odd as I would think that would be a feature of the mics..

You could not go wrong with either recording.. thanks for sharing

Title: Re: Sound Devices USBPre 2
Post by: page on March 22, 2011, 01:47:05 AM
I need some help folks. I've noticed when playing back audio via usb from a mac that periodically the usbpre2 seems to drop the signal. My mac never reports a drop, but metering and any analog signal outbound drops for about 1/2 second. I've tried 2 different macs (fresh reboots) and can repeat the issue. It varies how long it takes it to occur the first time (and varies each time afterward) but it's always under 10minutes. My test on Windows XP yielded a clean test so I'm wondering if it's a specific mac version or what.

Anyway, I have a flac file which when set to looping (via audacity is the easiest way I've found) will peg the meters and peaks so it becomes easier to watch for the dropout. Is there anyone who runs OSX and has a usbpre2 that would be willing to test this on their setup for me? I've been in contact with SD's support for the better part of 10 days now and I've run out of machines/configs to test it on.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on March 22, 2011, 08:50:27 AM
Yes, I can help.

Is it the same flac file dropping the audio? You said for about half a second so that means it instantly comes back and continues to play? So far has this only occurred once per play or if you leave it on longer than 10 minutes looping a number of flacs it occurs again?
Title: Re: Sound Devices USBPre 2
Post by: page on March 22, 2011, 09:32:56 AM
Yes, I can help.

Is it the same flac file dropping the audio? You said for about half a second so that means it instantly comes back and continues to play? So far has this only occurred once per play or if you leave it on longer than 10 minutes looping a number of flacs it occurs again?

Any flac file will do it in my experience (sendspace link (http://www.sendspace.com/file/ecggro)), and it is program/playback indescriminate. I just have a file I've constructed (tone and pulse) to make it easier to visually verify without listening when it occurs. It only occurs when using the USB playback (and affects all outputs). I've tried feeding it an optical signal with great success, so it's something related to the USB signal.


The original email I sent to SD:

occasionally (with no consistency of frequency) when
playing back audio to the usbpre2, I experience a momentary dropout of
sound, approximately 1/8 to 1/4th of a second in duration.

Firmware: 1.01
Operating System; OSX, 10.5.8
Operation; playback over usb (has not occurred over optical, no way to
test SPDIF on this machine)
Powering: Does not lose power (metering decays appropriately during
dropout and resumes when signal is returned.)
Buffer: I've increased the buffer on my playback program from 2000ms
to 4000 and then 10000ms with no improvement. Frequency or consistency
of occurrence does not change (both are still at random).

Occurs when running nothing else after rebooting and when running all
sorts of stuff. I have a USB hard drive attached, a usb keyboard,
mouse, and the usbpre2. I've tried inducing load on the hard drive,
keyboard and mouse all simultaneously (to proverbially "starve" the
usbpre2 due to traffic over usb) to no avail. I can occur as
frequently as once every 3 minutes or as infrequently as once every
couple of hours. Do you have any tips on trying recreate it with
consistency or to isolate whether it's the usb data traffic, the usb
power (although unlikely due to the decay demonstrated), or something
else?


edit: added sendspace link.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on April 15, 2011, 02:37:24 PM

Operating system & usbpre2 information

mac os x 10.5.8
Model Identifier:   MacBook4,1
firmware on usbpre2: 1..01

USB High-Speed Bus
  Host Controller Location:   Built In USB
  Host Controller Driver:   AppleUSBEHCI
  PCI Device ID:   0x2836
  PCI Revision ID:   0x0003
  PCI Vendor ID:   0x8086
  Bus Number:   0xfd

Software used
VLC media player Version 1.0.5 Goldeneye (PowerPC 32bit)



Results
Unable to reproduce the reported issue using the above listed hardware and firmware. Audio file was played several consecutive times and after a few small breaks, but the initial issue was unable to be reproduced. Audio was not monitored through headphones or speakers, only visual indication of the meters proved that the audio was playing from the computer to the usbpre2. Tests conducted with and without AC power from power supply.

Title: Re: Sound Devices USBPre 2
Post by: page on April 15, 2011, 03:18:27 PM

Operating system & usbpre2 information

mac os x 10.5.8
Model Identifier:   MacBook4,1
firmware on usbpre2: 1..01

USB High-Speed Bus
  Host Controller Location:   Built In USB
  Host Controller Driver:   AppleUSBEHCI
  PCI Device ID:   0x2836
  PCI Revision ID:   0x0003
  PCI Vendor ID:   0x8086
  Bus Number:   0xfd

Software used
VLC media player Version 1.0.5 Goldeneye (PowerPC 32bit)



Results
Unable to reproduce the reported issue using the above listed hardware and firmware. Audio file was played several consecutive times and after a few small breaks, but the initial issue was unable to be reproduced. Audio was not monitored through headphones or speakers, only visual indication of the meters proved that the audio was playing from the computer to the usbpre2. Tests conducted with and without AC power from power supply.


Thanks for the bump. I've found I can set it on repeat in Audacity and it won't drop a signal when it repeats (it actually sounds seamless). I've narrowed it down to occuring between 3 and 6 minutes, about every 4 minutes.

They wonder if it's related to my specific unit.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on April 15, 2011, 11:30:35 PM
Weird. Did sound devices offer any solutions?
Title: Re: Sound Devices USBPre 2
Post by: page on April 15, 2011, 11:32:45 PM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on April 17, 2011, 11:01:07 PM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.

Page, why do you have BOTH a 722 AND a USBPre2 ??? Since SD said they have exactly the same Pre/ADC....
Title: Re: Sound Devices USBPre 2
Post by: page on April 17, 2011, 11:09:55 PM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.

Page, why do you have BOTH a 722 AND a USBPre2 ??? Since SD said they have exactly the same Pre/ADC....

picked up the pre2 to link to the 722 and run 4ch. For example, I can run them in different places like at different stages at a festival, or run 1 off of the sbd and the other further FOB and resync in post. Traded in my grace 901 and used the cash to pick up the pre2 which I use as a headphone amp in the interim, thus, 2 free channels plus like $350 for the Sony D50.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on April 17, 2011, 11:48:19 PM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.

Page, why do you have BOTH a 722 AND a USBPre2 ??? Since SD said they have exactly the same Pre/ADC....

picked up the pre2 to link to the 722 and run 4ch. For example, I can run them in different places like at different stages at a festival, or run 1 off of the sbd and the other further FOB and resync in post. Traded in my grace 901 and used the cash to pick up the pre2 which I use as a headphone amp in the interim, thus, 2 free channels plus like $350 for the Sony D50.

Oh, nice! Well, that makes more sense now :)
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on May 05, 2011, 05:37:18 PM
So I saw on gearslutz that the Pre-2 has a DC offset issue that SD is working on fixing.  I'll try to post a link later.
Title: Re: Sound Devices USBPre 2
Post by: page on May 05, 2011, 11:58:38 PM
So I saw on gearslutz that the Pre-2 has a DC offset issue that SD is working on fixing.  I'll try to post a link later.

input only?

got a link?
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on May 06, 2011, 09:39:37 AM
thanx Jon
Title: Re: Sound Devices USBPre 2
Post by: NicStage on May 09, 2011, 03:14:04 PM
Firmware is up.

http://www.sounddevices.com/download/usbpre2-firmware.htm
Title: Re: Sound Devices USBPre 2
Post by: rastasean on May 19, 2011, 11:45:47 AM
Has anyone upgraded the firmware on their unit? any issues?
Title: Re: Sound Devices USBPre 2
Post by: notlance on May 19, 2011, 11:59:16 AM
I have upgraded to 1.03 and have had no issues.  Of course, I've been using the new version for less than a week.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on May 19, 2011, 12:00:12 PM
did the update and ran it the other night.   everything seemed just fine.  Ran mics in w/pads on, @ 24/48 digi coax out to DR-680
Title: Re: Sound Devices USBPre 2
Post by: acidjack on May 19, 2011, 12:03:03 PM
I've upgraded and had no issues, but in fairness, I had no issues (running into the R-44, at least) before.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on May 19, 2011, 08:19:46 PM
I've upgraded and had no issues, but in fairness, I had no issues (running into the R-44, at least) before.
Same here.
Title: Re: Sound Devices USBPre 2
Post by: audiosf on June 24, 2011, 11:32:19 AM
Would the Tekkeon MP3750 work fine with a SD USBPre 2 and a Tascam DR680?
Title: Re: Sound Devices USBPre 2
Post by: mepaca on June 24, 2011, 02:46:14 PM
Would the Tekkeon MP3750 work fine with a SD USBPre 2 and a Tascam DR680?
The 3450i would be better
Title: Re: Sound Devices USBPre 2
Post by: page on June 24, 2011, 02:51:06 PM
Would the Tekkeon MP3750 work fine with a SD USBPre 2 and a Tascam DR680?
The 3450i would be better

agreed

I've used my 3450i to power the pre2 before.
Title: Re: Sound Devices USBPre 2
Post by: acidjack on June 24, 2011, 03:12:04 PM
Also I'd be very careful powering the 680 off a Tekkeon. If you do, be sure to use the manual 12v setting.  Even then, I'd be awfully cautious.

Also, my third (!) 680 STILL will not take a feed from a USBpre2, even with the SD box's firmware updated. 
Title: Re: Sound Devices USBPre 2
Post by: rastasean on June 24, 2011, 06:27:10 PM
Just curious but what would make a 3450i better choice?
Title: Re: Sound Devices USBPre 2
Post by: audBall on June 24, 2011, 07:39:51 PM
The 3450i gives more DC output options.  The 3750 is limited to 10v and 19v only.  Kinda odd for taping purposes.
Title: Re: Sound Devices USBPre 2
Post by: rastasean on June 24, 2011, 07:44:51 PM
The 3450i gives more DC output options.  The 3750 is limited to 10v and 19v only.  Kinda odd for taping purposes.
Oh, okay, then I can understand the benefits over the 3450. Since the 3750 is a higher model number, I figured it would be better. ;)
Title: Re: Sound Devices USBPre 2
Post by: page on June 24, 2011, 08:55:26 PM
The 3450i gives more DC output options.  The 3750 is limited to 10v and 19v only.  Kinda odd for taping purposes.

plus the industrial model has more Wh. 58 compared to 50 IIRC.

I remember the operating temperature tolerances are higher on the i models.
Title: Re: Sound Devices USBPre 2
Post by: dogmusic on June 25, 2011, 12:53:54 PM
The 3450i gives more DC output options.  The 3750 is limited to 10v and 19v only.  Kinda odd for taping purposes.

plus the industrial model has more Wh. 58 compared to 50 IIRC.

I remember the operating temperature tolerances are higher on the i models.

Apparently the 3450i R2 has the USB port.
Title: Re: Sound Devices USBPre 2
Post by: page on June 25, 2011, 05:08:56 PM
The 3450i gives more DC output options.  The 3750 is limited to 10v and 19v only.  Kinda odd for taping purposes.

plus the industrial model has more Wh. 58 compared to 50 IIRC.

I remember the operating temperature tolerances are higher on the i models.

Apparently the 3450i R2 has the USB port.

Yes. Sorry for the misunderstanding, the i=R2 models do, the i-R1 don't.

The good news is that they have been making the R2 units for a good 6+ months so it shouldn't be really hard to find one. I had to hunt when I first got mine.
Title: Re: Sound Devices USBPre 2
Post by: page on July 13, 2011, 05:58:25 PM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.

Update:
sent it in, they found issues, they are sending me a replacement.
Title: Re: Sound Devices USBPre 2
Post by: page on July 24, 2011, 01:48:24 AM
Weird. Did sound devices offer any solutions?

not yet. still thinking. They are debating having me send it to them for tests.

Update:
sent it in, they found issues, they are sending me a replacement.

I now have machines with different versions (previously they were both 10.5.8), one is still on .5 the other is up to .6 now. The small dropouts are still found with the new unit on 10.5.8, but are absent on the 10.6 machine. SD verified other issues with the box so the swap wasn't in vein, but this does pose an interesting question about what changed in OSX between 10.5 and 10.6 that caused the USB audio to improve.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on July 24, 2011, 05:06:38 PM
I'm curious, you say small dropouts and you listed VLC as the playback software, any chance that the interaction between VLC and new OSX could be the root of the issue? Maybe VLC had the weird dropout and it's not  related to your mac system at all? 

Then off topic, how come you chose VLC.  I do like that program and in fact talked the college where I work into installing it on all classroom computers since it will play ANY video no matter how old it is. Bottom line is I got tired of getting called to classrooms to figure out why some old ass piece of software an instuctor was using wouldn't work.  We'd just intsall VLC and poof everything is fine but since the school uses imaged drives the instal goes away at shutdown.  I digress, but I never thought to use it as an audio playback and wondered why you ended up using it.....

OK sorry for hijack.........back to USBPRe2..... 
I have been using mine with the 15dB pads on all the time now after having some issues with clipping onstage mics with really loud bands.  anyone else notice the clipping issue?
Title: Re: Sound Devices USBPre 2
Post by: page on July 24, 2011, 10:08:23 PM
I'm curious, you say small dropouts and you listed VLC as the playback software, any chance that the interaction between VLC and new OSX could be the root of the issue? Maybe VLC had the weird dropout and it's not  related to your mac system at all? 

Sean listed VLC, I used Audacity as my benchtest program because it would seamlessly repeat audio, but I thought about the software interaction as well. Tried Songbird, Quicktime, Izotope's RX, and Audacity with the same results. Actually, the same program on different OSX versions worked (10.6 was ok), and the optical out never failed.

I spent some time looking over the differences and it was the operating system that was doing me in on the small dropout front (I also had general audio disruption which they could replicate on their end, thats a different problem though from the small dropouts). Now, an interesting thing I learned tonight was that while 10.5.8 (which I still have on one machine) should automatically do full speed mode upon plugging it in, mine doesn't seem to. Holding input1 while plugging it in seems to resolve the dropouts. I'd have to test it for a while to see if that's really true or not, but food for though.

Computer audio can be a real bitch sometimes...  ;)

Then off topic, how come you chose VLC.  I do like that program and in fact talked the college where I work into installing it on all classroom computers since it will play ANY video no matter how old it is.

Bingo, thats the only reason I have it installed (in general).

I have been using mine with the 15dB pads on all the time now after having some issues with clipping onstage mics with really loud bands.  anyone else notice the clipping issue?

Makes sense, I'm doing the same thing too. The max input on the 722 for mic in is like +10dbu, while the usbpre2's without pads is something like -10dbu and rated at +4dbu with the pads (which most professional mics are capable of reaching based on table 1 (http://www.sengpielaudio.com/calculator-transferfactor.htm)). Now, the line-in rating is a whopping +28dbu (2 more then the 7 series).
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on July 24, 2011, 10:28:29 PM
I'm curious, you say small dropouts and you listed VLC as the playback software, any chance that the interaction between VLC and new OSX could be the root of the issue? Maybe VLC had the weird dropout and it's not  related to your mac system at all? 

Sean listed VLC, I used Audacity as my benchtest program because it would seamlessly repeat audio, but I thought about the software interaction as well. Tried Songbird, Quicktime, Izotope's RX, and Audacity with the same results. Actually, the same program on different OSX versions worked (10.6 was ok), and the optical out never failed.

I spent some time looking over the differences and it was the operating system that was doing me in on the small dropout front (I also had general audio disruption which they could replicate on their end, thats a different problem though from the small dropouts). Now, an interesting thing I learned tonight was that while 10.5.8 (which I still have on one machine) should automatically do full speed mode upon plugging it in, mine doesn't seem to. Holding input1 while plugging it in seems to resolve the dropouts. I'd have to test it for a while to see if that's really true or not, but food for though.

Computer audio can be a real bitch sometimes...  ;)

Then off topic, how come you chose VLC.  I do like that program and in fact talked the college where I work into installing it on all classroom computers since it will play ANY video no matter how old it is.

Bingo, thats the only reason I have it installed (in general).

I have been using mine with the 15dB pads on all the time now after having some issues with clipping onstage mics with really loud bands.  anyone else notice the clipping issue?

Makes sense, I'm doing the same thing too. The max input on the 722 for mic in is like +10dbu, while the usbpre2's without pads is something like -10dbu and rated at +4dbu with the pads (which most professional mics are capable of reaching based on table 1 (http://www.sengpielaudio.com/calculator-transferfactor.htm)). Now, the line-in rating is a whopping +28dbu (2 more then the 7 series).

Page, just wondering, but why do you run usbpre2>722 when they are the exact same preamps ??? Or is that just heresay?
Title: Re: Sound Devices USBPre 2
Post by: page on July 24, 2011, 10:55:21 PM
Page, just wondering, but why do you run usbpre2>722 when they are the exact same preamps ??? Or is that just heresay?

I don't, my setup is to run them separately (mic audio>722 and sbd audio>usbpre2>d50) and link them via spdif so they share a clock signal, but carry 4 channels. It's my cheapsake attempt to avoid buying a second 722.

While there is little/no difference in sonic attributes between the two pre-amp stages, they do have different stats. So if there is a specific application (e.g. using mics in an ultra loud environment, or getting a really hot sbd signal), and because of different stats one box is better suited for a specific application, then I'd like to know that so I know which one to pair with which signal.
Title: Re: Sound Devices USBPre 2
Post by: F.O.Bean on July 24, 2011, 11:13:09 PM
Page, just wondering, but why do you run usbpre2>722 when they are the exact same preamps ??? Or is that just heresay?

I don't, my setup is to run them separately (mic audio>722 and sbd audio>usbpre2>d50) and link them via spdif so they share a clock signal, but carry 4 channels. It's my cheapsake attempt to avoid buying a second 722.

While there is little/no difference in sonic attributes between the two pre-amp stages, they do have different stats. So if there is a specific application (e.g. using mics in an ultra loud environment, or getting a really hot sbd signal), and because of different stats one box is better suited for a specific application, then I'd like to know that so I know which one to pair with which signal.

gotcha ;)
Title: Re: Sound Devices USBPre 2
Post by: rastasean on July 26, 2011, 12:40:15 AM
Glad to hear that you're not having the issues on the new OS but what's even more odd is that the mac I tested the playback on is 10.5.8. I think I may try running the test again but I don't think I will be able to get around to that until late this week.
Title: Re: Sound Devices USBPre 2
Post by: braweave on August 05, 2011, 01:22:31 AM
Has anyone used the Rca line outs on the Usbpre2?

I currently have Mp2 > r-09hr.

Thinking of upgrading to usbpre2 > r-09hr

I was wondering if I will really notice that much of a difference between the 2 pre's.
Title: Re: Sound Devices USBPre 2
Post by: acidjack on August 16, 2011, 04:07:49 PM
Has anyone noticed the headphone amp being kind of noisy, at least through the miniplug?  Running Macbook Air>USBpre2>Westone 3s I get a lot of hiss. I'm assuming the little earphones have higher self-noise than fullsize cans, but it still seems like more hiss than I'd expect.  I don't think (?) that the computer itself could generate the hiss since it's passing a digital signal, but perhaps I am mistaken.

FWIW the hiss is audible even if no music is playing; just if the unit is plugged in.
Title: Re: Sound Devices USBPre 2
Post by: bhadella on August 16, 2011, 04:12:43 PM
Has anyone noticed the headphone amp being kind of noisy, at least through the miniplug?  Running Macbook Air>USBpre2>Westone 3s I get a lot of hiss. I'm assuming the little earphones have higher self-noise than fullsize cans, but it still seems like more hiss than I'd expect.  I don't think (?) that the computer itself could generate the hiss since it's passing a digital signal, but perhaps I am mistaken.

FWIW the hiss is audible even if no music is playing; just if the unit is plugged in.

The headphone section is very noisy.   My R44 headphone out is much better than the Sound Devices box.   
Title: Re: Sound Devices USBPre 2
Post by: page on August 16, 2011, 05:12:01 PM
It's a known issue. The more sensitive your headphones, the more you will notice it because you won't be able to crank the gain to excape it. Something along the lines of orthodynamic based headphones would pair great since they eat current like twinkies (which the pre2 has oodles of) and are generally low impedance (which the pre2 is geared toward), but they are also ugly expensive and typically open-backed which are two strikes against field use...

I suspect it's like a TV with static on the W3s, they are very sensitive if they are anything like their UM3x monitor cousins.
Title: Re: Sound Devices USBPre 2
Post by: hi and lo on August 16, 2011, 05:44:46 PM

Also, my third (!) 680 STILL will not take a feed from a USBpre2, even with the SD box's firmware updated.

FYI to anyone that is interested, we FINALLY got the 680 to accept an SPDIF signal from the USBPre2. We didn't change anything to our knowledge, so no idea why it now works.
Title: Re: Sound Devices USBPre 2
Post by: Fried Chicken Boy on August 17, 2011, 12:07:38 AM
Has anyone noticed the headphone amp being kind of noisy

FWIW, same issue with the MixPre.  The preamp itself is a wonderful piece of gear but the headphone amp in it leaves a lot to be desired.
Title: Re: Sound Devices USBPre 2
Post by: acidjack on August 18, 2011, 03:02:34 PM

Also, my third (!) 680 STILL will not take a feed from a USBpre2, even with the SD box's firmware updated.

FYI to anyone that is interested, we FINALLY got the 680 to accept an SPDIF signal from the USBPre2. We didn't change anything to our knowledge, so no idea why it now works.

'Tis true, our 680 likes us now.  All known issues we had have been put to rest.  Also did successfully power this one off a Tekkeon at 10V without frying. 
Title: Re: Sound Devices USBPre 2
Post by: hi and lo on August 18, 2011, 03:54:37 PM
Also did successfully power this one off a Tekkeon at 10V without frying.

 :o :o :o

 :laugh:
Title: Re: Sound Devices USBPre 2
Post by: page on August 18, 2011, 04:33:24 PM
the pre2 at 10v or the 680?
Title: Re: Sound Devices USBPre 2
Post by: hi and lo on August 18, 2011, 04:48:11 PM
The 680 - wrong board/thread... perhaps? The fact that our 680 is a giant paperweight anymore? Totally awesome :)
Title: Re: Sound Devices USBPre 2
Post by: bhadella on October 17, 2011, 11:10:37 AM
My USBPre 2 just developed an issue where one of the led lights (showing Line 2s AUX being selected) always stays on.   I've heard of SD leds burning out but never staying on all the time.  I'm going to send her back in as it is still under the warranty period.   Has anyone ever encountered this before?   
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on November 30, 2011, 09:06:56 AM
DISCLAIMER:
My problem is that I need access to the SPDIF Output AND INPUT jack to allow the unit to be synced to another SPDIF signal.  If you do not care about that issue then you fine numerous right angle cords that would work for you.  Those cords all block access to the RCA SPDIF input jack. 8)

Since I found out that it looks like all premolded right angle USB cords are laid out wrong for my uses, I thought I'd post the solution I found.   One thing that has been driving me crazy is the USB cord to poweer the unit in a bag out in the filed.  The straight plugs was always getting in the way or just applying too much interference and/or pressure on the jack.  The USBS-2.0 right angle plugs are all oriented the same way it seems.  In fact almost every right angle plug including the 3.0 versions are the same.  I found this plug:
http://www.ebay.com/itm/390368013249?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Which is actually USB-3.0 version.  This is not only a much lower profile than a straight plug it also takes full advantage of the robust 3.0 style jack SD uses AND it exits down from the jack not horizontally.  It's 10 bucks on E-bay.  I'll post some pictures on the pre once I get it in hand
Title: Re: Sound Devices USBPre 2
Post by: acidjack on November 30, 2011, 11:20:16 AM
DISCLAIMER:
My problem is that I need access to the SPDIF Output AND INPUT jack to allow the unit to be synced to another SPDIF signal.  If you do not care about that issue then you fine numerous right angle cords that would work for you.  Those cords all block access to the RCA SPDIF input jack. 8)

Since I found out that it looks like all premolded right angle USB cords are laid out wrong for my uses, I thought I'd post the solution I found.   One thing that has been driving me crazy is the USB cord to poweer the unit in a bag out in the filed.  The straight plugs was always getting in the way or just applying too much interference and/or pressure on the jack.  The USBS-2.0 right angle plugs are all oriented the same way it seems.  In fact almost every right angle plug including the 3.0 versions are the same.  I found this plug:
http://www.ebay.com/itm/390368013249?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Which is actually USB-3.0 version.  This is not only a much lower profile than a straight plug it also takes full advantage of the robust 3.0 style jack SD uses AND it exits down from the jack not horizontally.  It's 10 bucks on E-bay.  I'll post some pictures on the pre once I get it in hand

Nice.  I too had this issue.  I also had the issue of wanting the "big" end to be RA so I could run into a Tekkeon but also use it to power my deck.  I ended up going with a Ted custom solution after the POS movable one I bought crapped out. 

Thanks for the link.... This should also serve most folks' purposes.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 12, 2011, 07:07:11 PM
Pics of USB 3.0 on the preamp. Should work great! Here is ebay link:
http://www.ebay.com/itm/390368013249?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
Title: Re: Sound Devices USBPre 2
Post by: Charlie Miller on December 13, 2011, 11:23:45 AM
Looks nice!  Isn't a TS member running one of these aready?? 


I started running the USBPre(1) back in 2001. It was very light and felt cheap, which is odd for Sound Devices. I liked the pre-amp, but ended up only using it as a Coax>USB converter. It powered off of the USB port, iirc. It also was limited to 16bit, I think.

The USBPre2 looks a lot better. Glad to see that they realized that they could do better.
Title: Re: Sound Devices USBPre 2
Post by: kirk97132 on December 13, 2011, 11:36:22 AM
Looks nice!  Isn't a TS member running one of these aready?? 


I started running the USBPre(1) back in 2001. It was very light and felt cheap, which is off for Sound Devices. I liked the pre-amp, but ended up only using it as a Coax>USB converter. It powered off of the USB port, iirc. It also was limited to 16bit, I think.

The USBPre2 looks a lot better. Glad to see that they realized that they could do better.
The Pre-1 was only able to be used with USB power and computer drivers.  It would not do standalone.
Title: Re: Sound Devices USBPre 2
Post by: H₂O on December 13, 2011, 12:58:14 PM
When was the USBPre released?  I thought it was around 2003?
Title: Re: Sound Devices USBPre 2
Post by: yug du nord on December 13, 2011, 02:18:04 PM
I haven't dug deep in the thread yet....   but does anyone successfully power the USBPre 2 off of the Tekkeon USB output?  Thanks.
Title: Re: Sound Devices USBPre 2
Post by: hi and lo on December 13, 2011, 02:19:57 PM
I haven't dug deep in the thread yet....   but does anyone successfully power the USBPre 2 off of the Tekkeon USB output?  Thanks.

Yep. Acidjack has been doing this for as long as he's owned both units.
Title: Re: Sound Devices USBPre 2
Post by: page on December 13, 2011, 02:21:25 PM
I haven't dug deep in the thread yet....   but does anyone successfully power the USBPre 2 off of the Tekkeon USB output?  Thanks.

Yep. Acidjack has been doing this for as long as he's owned both units.

I have as well. (722 off of the main out and the usbpre2 off of the usb slot)
Title: Re: Sound Devices USBPre 2
Post by: Charlie Miller on December 13, 2011, 03:05:05 PM
Looks nice!  Isn't a TS member running one of these aready?? 


I started running the USBPre(1) back in 2001. It was very light and felt cheap, which is off for Sound Devices. I liked the pre-amp, but ended up only using it as a Coax>USB converter. It powered off of the USB port, iirc. It also was limited to 16bit, I think.

The USBPre2 looks a lot better. Glad to see that they realized that they could do better.
The Pre-1 was only able to be used with USB power and computer drivers.  It would not do standalone.


I didn't even know that '2' does that. I think I need to pick one up.

Title: Re: Sound Devices USBPre 2
Post by: Fried Chicken Boy on December 13, 2011, 03:27:20 PM
Yup, v.2 runs circles around the original USBPre.
Title: Re: Sound Devices USBPre 2
Post by: page on December 13, 2011, 03:29:37 PM
Yup, v.2 runs circles around the original USBPre.

which is sort of why we have a 25 page thread that needs a part 2.  ;D
Title: Re: Sound Devices USBPre 2
Post by: rastasean on December 13, 2011, 06:31:56 PM
I haven't dug deep in the thread yet....   but does anyone successfully power the USBPre 2 off of the Tekkeon USB output?  Thanks.

Yep. Acidjack has been doing this for as long as he's owned both units.

I have done this as well. You don't even need the tekkeon, a $5 plastic USB sled with four AA does the same thing. USB power is pretty cool!

Thanks Kirk for posting this cable, VERY handy if you don't have 1-2 feet to comfortably keep the cable and pre in a bag.
Title: Re: Sound Devices USBPre 2
Post by: yug du nord on December 14, 2011, 09:29:43 AM
I haven't dug deep in the thread yet....   but does anyone successfully power the USBPre 2 off of the Tekkeon USB output?  Thanks.

Yep. Acidjack has been doing this for as long as he's owned both units.

I have as well. (722 off of the main out and the usbpre2 off of the usb slot)

Cool thanks fellas!  I'm thinkin about jumpin on board.
So....   this has the same (or very similar) pre amp and ADC as the 744 correct?  I'm lookin to use it for the ADC mainly. 
Title: Re: Sound Devices USBPre 2
Post by: page on December 14, 2011, 10:12:50 AM
Part 2: http://taperssection.com/index.php?topic=152253.0