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Gear / Technical Help => Recording Gear => Topic started by: dogmusic on September 11, 2018, 12:08:25 PM

Title: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on September 11, 2018, 12:08:25 PM
Does 24/96. About 4" x 2.5 " in size.

https://www.lectrosonics.com/US/SPDR-Stereo-Personal-Digital-Recorder/product.html

Expensive but very pocketable.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: heathen on September 11, 2018, 12:33:30 PM
Looks like this can do analog or digital stereo inputs, which is awesome.  MSRP is $1,495.  We need more small recorders with digital inputs, but that's quite a price tag.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on September 11, 2018, 12:33:56 PM
DESCRIPTION  SPECIFICATIONS
SPECIFICATIONS

Recording   
Storage media:   MicroSD (HC type)
File format:   .wav files (BWF) iXML metadata
A/D converter:   24-bit
Sampling rate:   48 kHz or 96 kHz
Recording modes/Bit rate:   
Input   
Type:   
Analog mic/line level compatible; servo bias preamp for 2V and 4V lavaliere microphones
Input 1 is switchable to AES3 two channel digital.
Input level:   
Dynamic mic: 0.5 mV to 50 mV
Electret mic: Nominal 2 mV to 300 mV
Line level: 17 mV to 1.7 V
Input connector:   TA5M 5-pin male
Headphone Output   
Connector:   3.5 mm mini jack; TRS
Maximum level:   -3 dBu (575 mV RMS)
Audio Performance   
Frequency response:   20 Hz to 20 kHz; +0.5/-1.5 dB
Dynamic range:   110 dB (A), before limiting
Distortion:   < 0.035%
Time Code   
Connector:   5-pin LEMO
Signal voltage:   0.5V p-p to 5V p-p
Input impedance:   10 k Ohms
Format:   SMPTE 12M – 1999 compliant
Battery Power/Life   
Battery type:   AA Lithium non-rechargeable (recommended)
Battery life:   20 hours typical at 48kHz sample rate(AA Lithium)
External Power:   
Input voltage:   6-17 VDC
Input current:   75 mA max @ 12 VDC (96 kHz recording)
Connector:   2.5mm coaxial connector, center pin positive
Operating Temperature Range   
Celsius:   -20 to 50
Fahrenheit:   -4 to 122
Dimensions and Weight   
Dimensions:   Inches: 3.9 H x 2.38 W x .82D
Millimeters:   99.06 H x 60.45 W x 20.83 D
Weight:   5.7 ozs. (162 grams) w/ AA lithium batteries (without belt clip)
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: flintstone on September 11, 2018, 01:01:55 PM
Lectrosonics links about the new recorder

Press release
https://www.lectrosonics.com/US/lectrosonics-introduces-the-spdr-stereo-portable-digital-recorder.html

Accessories
https://www.lectrosonics.com/US/Recorder-Accessories/category/spdr-accessories.html

PDF of the manual
https://www.lectrosonics.com/US/phocadownload/SPDR_manual.pdf

PDF data sheet with photos of controls, inputs
https://www.lectrosonics.com/US/phocadownload/SPDR_td.pdf

PDF of quick start guide
https://www.lectrosonics.com/US/phocadownload/QSG_SPDR.pdf

MSRP $1495
Location Sound $1179


Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: goodcooker on September 11, 2018, 01:47:22 PM

Adding digital input and timecode adds quite a lot to the cost of a recorder. This looks like it's aimed at film and/or TV recordists.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on September 11, 2018, 03:04:44 PM
Would really dig it if they'd offer a similar sized version capable of recording 6 to 8 channels.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: pohaku on September 11, 2018, 09:58:33 PM
Would really dig it if they'd offer a similar sized version capable of recording 6 to 8 channels.

Price would probably be scaled to match.  They make first class gear, but it is priced accordingly for the pro market.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 12, 2018, 01:40:10 AM
I work in film, so maybe this is more exciting to me than most, but this is a dream machine. To get 2 channels of Lectrosonic quality with timecode for $1200 is amazing. I'll report back once I've recorded some shows with it.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on September 12, 2018, 09:14:40 AM
They make first class gear[..] priced accordingly for the pro market.

Lectrosonic quality

Yes indeed.

Interested to hear your thoughts after using it Tim.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on September 12, 2018, 10:24:19 AM
I work in film, so maybe this is more exciting to me than most, but this is a dream machine. To get 2 channels of Lectrosonic quality with timecode for $1200 is amazing. I'll report back once I've recorded some shows with it.

How would you say Lectrosonic quality of their preamps compares to Sound Devices?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 12, 2018, 11:10:22 AM

How would you say Lectrosonic quality of their preamps compares to Sound Devices?
[/quote]
I would say they are quite comparable. There is a reason Lectrosonics dominates the wireless market, I'd guess the majority of the dialog audio you hear in movies and TV comes through Lectrosonics wireless, lav and boom, and this point. I say dialog because that's my main area of work, I haven't recorded live music with my wireless before, which is part of the reason I'm excited for this, but also I'm excited so I can have high quality recordings of nature ambience when I go backpacking.  I expect this to be similar to my wireless, transparent, low noise, and great dynamic range. Some things I like are that it will be difficult to accidentally stop recording, the safety track mode, and it's minimalism.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on September 12, 2018, 03:35:53 PM
I'm excited so I can have high quality recordings of nature ambience when I go backpacking.  I expect this to be similar to my wireless, transparent, low noise, and great dynamic range. Some things I like are that it will be difficult to accidentally stop recording, the safety track mode, and it's minimalism.

I would want it for field recordings as well, not so much for music. In your line of work, I imagine a lot of people would be using SD recorders for dialog as well. Are they considered to be on a par with Lectrosonics in your industry?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Ronmac on September 12, 2018, 03:50:09 PM
This with a stereo pair of DPA 4060 will make a killer rig for plants, ambiance and stealth music gigs.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on September 12, 2018, 03:59:58 PM
This with five or seven DPA 4060 will make a killer rig stealth music gigs.

FTFY  ;)

..still dreamin'
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: junkyardt on September 12, 2018, 04:25:53 PM
i'm not actually interested in this at all as i recently got a mixpre-6, but i am genuinely curious (not criticizing) -- how would the lack of XLR, 1/4" or 1/8" inputs translate to what we do? the sole input being TA5M 5-pin? maybe i'm just naive, but that seems like a hindrance for concert taping. i'm actually completely unfamiliar with that type of connector as none of my gear has ever had that.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: aaronji on September 12, 2018, 04:32:33 PM
This with a stereo pair of DPA 4060 will make a killer rig for plants, ambiance and stealth music gigs.

I had the same thought. Pretty expensive, though, between the cost of the recorder and the microdot-to-lectrosonics adapters ($100 each). I wonder how it would compare soundwise to a d:vice and iPhone setup. The d:vice route could be quite a bit cheaper, particularly if you already use an iPhone or iPod.

[Edit to add: And, of course, you get a phone or music player if you go the d:vice route!]
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: noahbickart on September 12, 2018, 04:34:25 PM
i'm not actually interested in this at all as i recently got a mixpre-6, but i am genuinely curious (not criticizing) -- how would the lack of XLR, 1/4" or 1/8" inputs translate to what we do? the sole input being TA5M 5-pin? maybe i'm just naive, but that seems like a hindrance for concert taping. i'm actually completely unfamiliar with that type of connector as none of my gear has ever had that.

It's perfectly easy to make a dual xlr to TA5 cable.

I'd imagine that the new sonosax pre/ad> aes into this would be about as good a stealth rig as could be.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 12, 2018, 09:31:55 PM
This with a stereo pair of DPA 4060 will make a killer rig for plants, ambiance and stealth music gigs.

dvice equals it at 1/3 of the cost
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dactylus on September 13, 2018, 06:47:11 AM

I'd imagine that the new sonosax pre/ad> aes into this would be about as good a stealth rig as could be.

^
I was thinking the same thing...
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 14, 2018, 09:56:48 PM

Adding digital input and timecode adds quite a lot to the cost of a recorder. This looks like it's aimed at film and/or TV recordists.

its the first bit bucket in that size since the garbage maudio microtrack

Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 14, 2018, 10:05:23 PM
great match for schoeps CMR.

what you spend on recorder you save on AD and mic bodies

CMR wiring for Lectrosonics:

https://www.lectrosonics.com/Support/component/com_fsf/Itemid,714/tag,Wireless,%20Schoeps,%20CMR,%20mic,%20adapter,%20servo,%20input,%20amplifiers/view,faq

which doesnt happen to match anything in the manual

bummer it has a "rugged aluminum housing" with all the metal detectors these days
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: pohaku on September 15, 2018, 01:41:25 PM

Now that’s a consideration.  An alternate rig for my CMRs.  Thanks!


great match for schoeps CMR.

what you spend on recorder you save on AD and mic bodies

CMR wiring for Lectrosonics:

https://www.lectrosonics.com/Support/component/com_fsf/Itemid,714/tag,Wireless,%20Schoeps,%20CMR,%20mic,%20adapter,%20servo,%20input,%20amplifiers/view,faq

which doesnt happen to match anything in the manual

bummer it has a "rugged aluminum housing" with all the metal detectors these days
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 19, 2018, 01:12:49 AM
Mine is on the way  ;D

I would want it for field recordings as well, not so much for music. In your line of work, I imagine a lot of people would be using SD recorders for dialog as well. Are they considered to be on a par with Lectrosonics in your industry?
In my experience most location sound people are using Sound Devices (personally I use Zaxcom though), and the way I have always seen Lectrosonic wireless being used is their pre into the line in. In news they usually use Lectrosonic receivers going directly into the camera (and broadcast cameras have a specific slot for that). This is a long way of saying that Lectrosonics sound very good.

i'm not actually interested in this at all as i recently got a mixpre-6, but i am genuinely curious (not criticizing) -- how would the lack of XLR, 1/4" or 1/8" inputs translate to what we do? the sole input being TA5M 5-pin? maybe i'm just naive, but that seems like a hindrance for concert taping. i'm actually completely unfamiliar with that type of connector as none of my gear has ever had that.
For sure this product is not aimed directly at tapers. But if you work in film/tv the TA5 is pretty much the standard for lav/bodypack wireless mics. It's a very robust connection, essentially a small XLR. Personally I already own lav mics that use the TA5, so it is perfect for me. I do agree that for anyone who doesn't already own the correct type of mics or has a specific need for this type of device it probably isn't of much interest.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 19, 2018, 01:14:57 AM
This is a long way of saying that Lectrosonics sound very good.

im sure its HQ but something designed for voice may not be the best for music in all cases
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on September 19, 2018, 11:58:37 PM
Mine is on the way  ;D

I would want it for field recordings as well, not so much for music. In your line of work, I imagine a lot of people would be using SD recorders for dialog as well. Are they considered to be on a par with Lectrosonics in your industry?
In my experience most location sound people are using Sound Devices (personally I use Zaxcom though), and the way I have always seen Lectrosonic wireless being used is their pre into the line in. In news they usually use Lectrosonic receivers going directly into the camera (and broadcast cameras have a specific slot for that). This is a long way of saying that Lectrosonics sound very good.



Thanks for that information!
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: DSatz on September 23, 2018, 03:34:40 PM
What is the level setting / level metering arrangement on this recorder? I only looked at the product description briefly, but it seemed to me as if it might require some trial and error.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 23, 2018, 03:39:06 PM
multi function indicator light

i believe its
green at -20dB red at 0dB
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: DSatz on September 23, 2018, 07:35:14 PM
For me that's a deal-breaker--not knowing within ±10 dB where my levels are. I can't spend all my time with my fingers crossed, waiting for an LED to tell me I'm f**ked.

Some equipment is very well designed for its intended application, but that application may not be my application ...
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 24, 2018, 07:49:04 PM
multi function indicator light

i believe its
green at -20dB red at 0dB
For me that's a deal-breaker--not knowing within ±10 dB where my levels are. I can't spend all my time with my fingers crossed, waiting for an LED to tell me I'm f**ked.

Some equipment is very well designed for its intended application, but that application may not be my application ...

I've received mine today, and there is, in addition to the LEDs, a meter on the display. I will note though, it is quite small.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: audBall on September 24, 2018, 08:02:10 PM
Despite the small text and resolution of the meter, I am quite impressed with their use of pixels in that limited space.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Fatah Ruark (aka MIKE B) on September 24, 2018, 08:57:51 PM
More photos please! Feel free to include a banana for scale.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 25, 2018, 01:02:43 AM
More photos please! Feel free to include a banana for scale.

I hope a plantain is ok, I don't have any bananas. But really there isn't much to show, it's basically a deck of cards sized.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on September 25, 2018, 08:59:50 AM
I hope a plantain is ok, I don't have any bananas. But really there isn't much to show, it's basically a deck of cards sized.

Proper grammar would be- Yes, I have no bananas.

(the new) NRBQ's retort- https://youtu.be/o6LNJw7WrvY
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: audBall on September 25, 2018, 10:41:33 AM
Now I want fried plantains.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: lsd2525 on September 25, 2018, 10:45:04 AM
Is that a plantain in your pocket or are you just happy to see me?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on September 25, 2018, 01:49:45 PM
I've received mine today, and there is, in addition to the LEDs, a meter on the display. I will note though, it is quite small.

how responsive is it? does it peak hold and for how long?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 25, 2018, 11:35:25 PM
how responsive is it? does it peak hold and for how long?
There is no peak hold, I'm ok with how responsive it is. It's a tiny bit slow on claps etc., but not bad at all.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim in jersey on September 26, 2018, 08:23:12 AM
A V3 and this seems perfect. Compact.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: noahbickart on September 26, 2018, 09:05:12 AM
A V3 and this seems perfect. Compact.

It's the bit bucket we all dreamed of 10 years ago. Even at over $1k, I bet it would have become dominant in the section back then.

Now a days, given the mixpre line, the zoom series, and all the other small 4 and 6 channel all in one recorders, I suspect fewer tapers will buy these, but I'm intrigued.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: aaronji on September 26, 2018, 10:34:36 AM
I've received mine today, and there is, in addition to the LEDs, a meter on the display. I will note though, it is quite small.

In the manual, the pictures of the meters show only -40/-20/0 markings.  Is that user adjustable in any way?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on September 26, 2018, 07:42:14 PM
In the manual, the pictures of the meters show only -40/-20/0 markings.  Is that user adjustable in any way?

It doesn't seem to be user adjustable.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: aaronji on September 27, 2018, 06:55:48 AM
^ Thanks.  It would be nice if they had some marks in between -20 and 0, maybe a tick at -12 or -6.  Perhaps that can be changed in a firmware update.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on September 27, 2018, 11:08:18 AM
When does Zaxcom's patent on their Neverclip input gain strategy expire?  I'd like to set input trim based on microphone sensitivity and not otherwise need to actively adjust recording gain until I switch to different microphones.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on October 14, 2018, 09:45:18 PM
Finally got to tape a show with this. It was a bit of trial by fire, My Bloody Valentine is about as loud a band as one might come across. It's not the best sounding show, but I'd say it's pretty accurate for what it sounded like. Sample is attached, and if you are into Dime, you can find the whole sethttp://www.dimeadozen.org/torrents-details.php?id=632775 (http://www.dimeadozen.org/torrents-details.php?id=632775).
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dactylus on October 20, 2018, 10:42:31 AM
Finally got to tape a show with this. It was a bit of trial by fire, My Bloody Valentine is about as loud a band as one might come across. It's not the best sounding show, but I'd say it's pretty accurate for what it sounded like. Sample is attached, and if you are into Dime, you can find the whole sethttp://www.dimeadozen.org/torrents-details.php?id=632775 (http://www.dimeadozen.org/torrents-details.php?id=632775).

Hello Tim,

Have you had the chance to record another show with this recorder?  If so have you used mics other than the DPA 4060's?

Have you used this recorder as a bit bucket yet?  Thanks.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on October 22, 2018, 08:52:49 PM
I have taped another show last night, but it's in a shitty venue, so probably not really exciting to listen to. So far only the DPAs, that is mainly why I got it. I did just get a Denecke PS-2 phantom power supply so once I have the cables built I can use it with my other microphones. I haven't tried it as a bit bucket, nor really ever had much intention with that, but I can't imagine it wouldn't work perfectly well. If someone feels like lending me a pre to try it I'd be happy to do so.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: daspyknows on October 25, 2018, 02:11:05 PM
great match for schoeps CMR.

what you spend on recorder you save on AD and mic bodies

CMR wiring for Lectrosonics:

https://www.lectrosonics.com/Support/component/com_fsf/Itemid,714/tag,Wireless,%20Schoeps,%20CMR,%20mic,%20adapter,%20servo,%20input,%20amplifiers/view,faq

which doesnt happen to match anything in the manual

bummer it has a "rugged aluminum housing" with all the metal detectors these days

was intrigued up to this point  "rugged aluminum housing".  I have half a dozen DR-2Ds so no urgency.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on December 03, 2018, 03:40:01 AM
heres a good hands on that show the size and menus a bit

https://www.youtube.com/watch?v=bGauZbSpLOU
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 02, 2019, 03:54:00 AM
i made a post about using the Schoeps CMRs with the SPDR in the CMR thread

https://taperssection.com/index.php?topic=100090.msg2289988#msg2289988

i pulled the trigger, i join team SPDR on thursday!
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: DSatz on February 05, 2019, 01:37:03 PM
Mr. F., please see the message that I left for you in that other thread.

--best regards
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 07, 2019, 07:51:39 PM
got mine today.

the rubber microsd cover came off immediately and i couldnt get the barbed rubber thing back in by hand. tried to press down on it with a ball point pen to seat it, it literally bent and cracked the metal case. i thought these were supposed to be "rugged pro gear", so much for that...

(https://i.imgur.com/ufqrUBI.png)

i guess you need to take the unit apart to pull the barb thru. small detail, but for $1200 i expect a little more

**EDIT: they RMA'd it. good looks**
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 08, 2019, 03:33:43 AM
i still need to make an input cable so i dont have anything to test yet. I've been playing with the menus and its a little different than anything ive used before, guess its more broadcast based

it doesnt seem to display recorded time, just timecode time starting from zero from when you power up.

adjusting input levels are buried in the menu, so you need to start your recording and go to menu>inputs>input level

recording starts with one button (none of that "rec-pause" stuff-who hasnt mistakenly left their recorder in rec-pause mode and recorded nothing!)

recording is hard to turn off accidentally, requires simultaneously pressing 2wo buttons (good)

power is hard to turn off accidentally, requires 3 second long press. impossible to even turn off while recording, you need to stop first

i like how the menu is simple and if youre staying in same input and sample rate, you really just need to power up, hit record, and then stop when youre done.

it takes about 3 seconds to start recording from a powered off state :)

like my R-07, the dual volume/safety track only works in 48K, not 96
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 09, 2019, 06:26:11 AM
OK i wired up the CMRs today

test rig: MK4V>CMR on stand about 1m from a pair of 8" KRK Rokit powered monitors.

channel 1: CMR#1 wired directly to line in with no resistance
channel 2: CMR#2 wired to mic in, with 1.5Kohm resistor inline with signal lead

both mics powered by the "5V" power. it tests at 5.0V (+/- 0.05) without a load, but as soon as i plug the mics in it drops to 4V (which is right at the lower limit of spec for CMR)

had rolloff set to 50KHz just for the heck of it. not really useful in this test but prob how i would use it in the field

line in was surprisingly sensitive. input level goes from -7 to 44 (strange scale but whatever...), and when line in is set to max of 44, similar level was achieved on mic in at a setting of 29. this 15 unit bias seems to be consistent at various levels.

I recorded a bunch of content at different levels, both soft and loud (as loud as this setup would go, i was limited as monitors were clipping, see below for test with better sound source at higher SPL).

the background noise with the db app on my phone was measured at 37 dB. app is somewhat useful but i dont think it reads accurately above 90 dB

heres some samples:

Mark Knopfler "wag the dog" played softly, db meter said 65-70. I cant imagine recording any material quieter than this

audio recorded(raw,low level, some talking by me before it gets going): https://drive.google.com/open?id=1WpVuOZtGt9F5HQhibXhgy3h8YVIGsCup (https://drive.google.com/open?id=1WpVuOZtGt9F5HQhibXhgy3h8YVIGsCup)
short vid of test method (audio from phone): https://photos.app.goo.gl/QBjaUWu1N8Adv3NfA (https://photos.app.goo.gl/QBjaUWu1N8Adv3NfA)
you can see the 20 dB level indicators blinking on occasion in the vid, also see how the menu and controls work a bit

for most of it:
left channel, line in, level set to 44, peak dB was 19, RMS was -38
right channel, mic in, level set to 29, peak dB was 19.7, RMS was -38.7
(pretty good level matching for eyeballing! the meters on this are tiny but obviously good enough for our purposes)

near the end of "wag the dog" and for the portion of "working on it", i cranked the level on the right channel (mic in) up to its max of 44. the wag the dog portion had a peak around -6db and an rms around -24. Keep in mind this is very quiet source material, and if additional gain was needed you could swap that resistor out for a 500 ohm.

"working on it" is a quiet acoustic number, and with both channels cranked to the max of 44, left channel line in was -28db peak and -43db rms. right channel mic in was -13dB peak, -28 dB rms

------

ok now for some loud material. Here is Eyes of the World from the RFK 89 boxset. my dB meter said ~90 but i think thats where the mic on my phone tops out so lets just say its 90+ dB...

audio recorded: https://drive.google.com/open?id=1GPFzutHve8NKEUBJfmEhlgbdDusx3uKT (https://drive.google.com/open?id=1GPFzutHve8NKEUBJfmEhlgbdDusx3uKT)
short vid of test method (audio from phone): https://photos.app.goo.gl/eW5quXemhgd4yG447 (https://photos.app.goo.gl/eW5quXemhgd4yG447)
here we see level indicators constantly lit, occasionally blinking off as it dips below -20dB. if you were peaking at 0 dB they flash red. i have yet to test how the limiter works

here we have something approaching the volume of tapers section at a rock-concert. so we can turn it down and have some headroom

left channel, line in, level set to 32, peak dB was -8dB, RMS was -23dB
right channel, mic in, level set to 18, peak dB was ~ -8dB, RMS was ~ -23dB (this time i matched within a 1/2 dB, again, impressive level indicators)

-------

ok last test. this is the mics wrapped up in wool socks, and a tshirt, under a parka, inside my car, in a snowstorm. i wanted to test the self-noise of the mics and see if line in and mic in were any different. both were set to the same 32&18 as in the last two tests to simulate normal recording levels of loud material. results were impressive! again this isnt strictly input noise of the recorder, this is with mics attached so that seems reasonable to me, what do you think? note that the mic in actually *looks* a little quieter graphically, but not by much. the stats window i used was goofy. when i highlighted either channel and scanned like i was gonna normalize, it said
left channel (line in):  peak:-65.6 dB, RMS -77.8 dB
right channel (mic in) peak:-63.6 dB, RMS -78dB (peak is due to weird tick at 49 seconds)

that should be well below room noise in any case.

Overall i am very impressed with the unit. its my dream gear. great sound, low noise. simple, elegant, bombproof. almost impossible to mess your recording up

(https://i.imgur.com/CQOjUVy.png)



 

Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 11, 2019, 12:04:11 AM
another test with higher SPL on better system. dont think theres any issues with the recorder setup. I intentionally pushed the levels to occasional red on the SPDR. its hard to see the meters in this vid but just to the right of the zero level mark is a block labeled 'C' which it hits on occasion

Prince - Musicology
mics: wired same as above (line in on left, input level 38, mic in on right, input level 23
recorded flac: https://drive.google.com/open?id=1DhdjQp9kTFw92ml-Av8ButugZmxzmoIJ (https://drive.google.com/open?id=1DhdjQp9kTFw92ml-Av8ButugZmxzmoIJ)

vid of test (phone audio), showing what the levels were doing. also a quick pan to show my uber test setup in immaculately organized listening room. used MK4s for this test:
https://photos.app.goo.gl/RAdcUUFRos5QdAVm6

limiter did a good job, occasional reds were inaudible. heres one of the limited peaks
(https://i.imgur.com/QVlwkN8.png)
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 11, 2019, 01:17:34 AM
another test pounding the levels a little harder with appropriately "Too High" by Stevie Wonder

limiter fails to prevent clipping in this case. pounding the red consistently and you can hear clipping. you can see the 'C' on the level meter better in this vid (its pixelated block lettering)

audio: https://drive.google.com/open?id=1P6xM3j-vfgIq4xD8lfRkfcWh57MMpM16 (https://drive.google.com/open?id=1P6xM3j-vfgIq4xD8lfRkfcWh57MMpM16)

video(phone audio): https://photos.app.goo.gl/RZMKubvqHk751PZi9 (https://photos.app.goo.gl/RZMKubvqHk751PZi9)

pic of clipped waveform right when stevie starts the vocals (first "high"):
(https://i.imgur.com/QIXfC7l.png)

-------------------------
OK final test, again musicology. this time i recorded in "split gain" mode (regular track plus safety track 18 dB down)

absolutely pushed the levels hard on purpose. safety track is unaffected even though its peaking to -10 dB (which means the main track is pushing +8dB over FSD)

im fiddling with the levels from 0:35 to 1:20 in the vid, started at 38/23, then went to 27/12 just after 1:20 (and turned up sound source accordingly). I was still able to hit FSD with line in levels set to 27 (of 44) with this very loud source so i think im gonna wire the CMRs line in for the first few shows. Also note that the lectrosonics-suggested 1k5 resistor was on the shy side for very loud sources,and bernhard's rec of 3k3 might be better for VERY loud sources. i dont have an accurate SPL meter but ill bet that dynaudio BM15P monitor at 160W is well over 120 dB at a foot away (max spl is 128dB at 1m).  Most importantly, it doesnt seem that the mics' headroom is compromised (audibly) when powered at 4V, which is good. from what i understand, input voltage primarily affects output level (and the 4V the mics are getting seems to put out an acceptable level). I have a question into bernhard as to whether mic headroom would be affected. in any case i think it sounds great based on my testing. it would be a shame if we had to add a battery box to bump up voltage, as that is the unit's main appeal IMO, a single-box solution

As you can see from the vid, adjusting levels is menu based and isn't super easy (i was in the main recording window, i had to go menu>select 'input'>select 'input level') - this is by design, in the manual it suggests calibrating input level to highest input level prior to, and forgetting it. obviously not our application unless youre lucky enough to be in for soundcheck

you could technically stay in the level adjustment menu, but you cant start and stop recording from there, only in main recording window

safety track audio: https://drive.google.com/open?id=1KCZRSAB0bxpCr8Ey79lTyGakmQPxc1UJ
 (https://drive.google.com/open?id=1KCZRSAB0bxpCr8Ey79lTyGakmQPxc1UJ)
main track with blown out levels: https://drive.google.com/open?id=1FzCvrhtR0aOLpd_YujqO8pspi5Q6TqCf (https://drive.google.com/open?id=1FzCvrhtR0aOLpd_YujqO8pspi5Q6TqCf)

pic of main track with blown out levels:
note the asymmetry on the "overs", perhaps there is a 1 dB DC offset? I have a question into Lectrosonics about this. perhaps it is the mics
(https://i.imgur.com/Cc6lk4K.png)


vid of test: https://photos.app.goo.gl/c4gHSgQ1qDfD7UN27 (https://photos.app.goo.gl/c4gHSgQ1qDfD7UN27)


when in split-gain mode, the unit writes a multichannel (4-track) wav (notably you cant replay your file on the device when recording in split gain mode., it apparently tries to read the 4ch file as 2ch pcm data, and is slow and riddled with noise). pic of 4-channel wav open in soundforge (new to me, at least):
(https://i.imgur.com/mU7sO71.png)

link to raw 4-ch wav from recorder (not sure i can make this a flac). note this raw track pre-rolls the video above by 18 seconds or so: https://drive.google.com/open?id=1O4ebdo91rCBERbCjczBlplZHuVcolyUc
 (https://drive.google.com/open?id=1O4ebdo91rCBERbCjczBlplZHuVcolyUc)
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 21, 2019, 09:04:45 AM
thats a wrap. I had to wait to get the side-entry low-pro Cable Techniques mini-xlrs. Cut the cables down to just under 5' and will use extension cables for open taping
 
Happy with the result :cheers:

(https://i.imgur.com/iNcEF5F.png)
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on February 21, 2019, 10:22:13 AM
Beautiful
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Sebastian on February 21, 2019, 12:00:06 PM
That's an awesome little Schoeps setup! 👍
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: nak700s on February 21, 2019, 12:50:53 PM
bummer it has a "rugged aluminum housing" with all the metal detectors these days

My first thought as well...which is why I like my Edirol R-09HR.  It has never set off a metal detector.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 21, 2019, 05:54:12 PM
bummer it has a "rugged aluminum housing" with all the metal detectors these days

My first thought as well...which is why I like my Edirol R-09HR.  It has never set off a metal detector.

schoeps would prob set off a metal detector anyway. i have my dpa>iphone setup for the impossible gigs
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: kindms on February 21, 2019, 07:43:03 PM
would love to go V3 AES to the SPDR but they are a little pricey for just that me thinks

sweet looking setup
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: daspyknows on February 21, 2019, 11:34:05 PM
Nice looking Schoeps rig.  So how does the mic pre compare to an nbox? 
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 22, 2019, 02:39:32 AM
i have no idea. its pretty clean based on my tests. cleaner than the mics.

sounds clear and dynamic, see samples on previous page

id almost like to send it off to someone more knowledgeable to do some good input noise measurements on it
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on February 24, 2019, 07:35:49 PM
success last night

the idiotproofness of this device is great.

started show at input level of 30> saw one red peak in first minute >dropped level to 24 and forgot about it for rest of show. resulting wav was mostly peaking between -6dB and -2 dB

level lights are good, pretty much if your -20dB green lights are lit most of the time youre in a good zone. the belt clip is handy you can clip it and look down your shirt and see level lights. if you keep it in the input level menu screen the buttons are tactile and you can adjust up and down without looking at display

i ran 4Vs in my hat and dpa core 4061>d:vice in croakies on my glasses so should be a good comp between the  >:D rig and the invisible rig
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 03, 2019, 09:25:47 AM
heres the MK4V recording of AURORA. I know y'all are dying for some electropop  :lol:

i was right up near the stage as i mentioned in that other thread. its an odd combination of the PA wedge i caught, and the high stage volume from the drums. i did "balance" the percussion and vox in izotope RX7

in the end, the clarity and bass extension is there... sounds like mk4v to me.

this was on the louder end of anything i would record, sounds like it was within the max spl of the CMRs powered at the 4 volts the lectrosonics puts out (minimum for CMR spec).

show has a good mix of softer and louder stuff, check it out. particularly "in bottles" and "it happened quiet"

FLAC 24 (also as a .torrent on DIME): drive.google.com/open?id=16uvJpIEZMvx1EqSBbOU8l1j8Sp4PQI8T (http://drive.google.com/open?id=16uvJpIEZMvx1EqSBbOU8l1j8Sp4PQI8T)

MP3 V0 (downloadable archive): drive.google.com/open?id=1kUQn7vthU9lYqZNFMWRIiJiW5ydnGqfU (http://drive.google.com/open?id=1kUQn7vthU9lYqZNFMWRIiJiW5ydnGqfU)

MP3 V0 (streamable folder): drive.google.com/open?id=1O7xh9VZWIqJ-g1mFZbE6O6naVOUcApD8 (http://drive.google.com/open?id=1O7xh9VZWIqJ-g1mFZbE6O6naVOUcApD8)





Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 08, 2019, 12:34:29 AM
got my knockoff microdot to TA5F adapters
https://www.ebay.com/itm/YAM-C5L-B-Microdot-Adapter-FOR-DPA-Fits-Lectrosonics-Bodypack-Transmitter/181444266441 (https://www.ebay.com/itm/YAM-C5L-B-Microdot-Adapter-FOR-DPA-Fits-Lectrosonics-Bodypack-Transmitter/181444266441)
 ($30 knockoff of $100 DPA DAD3056 - there wasnt really a spec or wiring diagram given, but a measurement shows this particular one has 3.9K resistor on pin 3,and  pins 2&4 shorted as expected to give 4V servo power)

I did some tests of various setups to assess noise floor

I set up a mic stand in my living room in a triangle with a stereo pair of monitors and did 3 setups:
A: dpa 4061>d:vice (reference since that equipment is designed by the mfr to be used together, d:vice should provide full 5V power to 4061)

B: dpa 4061>microdot to TA5F adapter>SPDR (SPDR only puts out at most 4V to 4061, which is lower than  its 5V spec. will it affect the sound?)

C: MK4V>CMR>SPDR

i matched levels as close as i could by eye on a dynamic passage. did 3 songs and resulting waveforms looked like
A:d:vice gain at +20dB and metarecorder levels at 75%: peaked at -10dB
B:dpa>SPDR input level set to 31, peaked at -8 dB
C:mk4v>SPDR  input level set to 35, peaked at -12 dB

when normalized to same level, and looking at the "quiet space" between songs (room noise of my DVR, refrigerator, etc)
A.dpa>d:vice noise level -72 dB RMS
B.dpa>SPDR noise level -66 dB RMS
C.MK4V>SPDR noise level -72 dB RMS

my read is that the actual room was ~-72dB, but the DPA>SPDR had higher noise for one of two reasons
-mic output (relative to self noise) is reduced because of being powered below voltage
-using mic-in on SPDR instead of line-in like the schoeps (less likely as my previous tests of CMR in mic-in and line-in were not that different)

using 3V 4063s instead of 5V 4060/4061 would likely solve this issue. i have not determined if the 4061s at lower voltage have reduced max SPL but this would not surprise me. in these moderate-volume tests they sound identical to my ears

ill try to do some tests with sine waves at high spl and see if i can visually see distortion


Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 08, 2019, 03:29:14 AM

ill try to do some tests with sine waves at high spl and see if i can visually see distortion

welp.... i just found the quickest way to blow both of my $220 dynaudio tweeters.... fuck. one was like 6 mos old.

from another site where someone had a similar experience...

If you play a high frequency tone at normal listening levels, you will blow lots of tweeters and fast. When doing what you are doing, it must be way below normal listening levels. Tweeter wire is thin. A sine wave gives the VC no break, and will burn out at half a watt or so if you keep it up. You have to be very, very careful playing high frequency sine waves through speakers. Tweeters are fragile items and are easily blown doing what you are doing.

The rule for high frequency tones and tweeters is KEEP IT LOW and SHORT.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Sebastian on March 08, 2019, 08:14:39 AM
Thanks for all your research about the SPDR. This is quite interesting to follow. And very sorry about your speakers.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 08, 2019, 02:14:43 PM
it is what it is. some lessons are more expensive than others. i'm "upgrading" them to Morel MDT32S (the "upgrade" being that they are $80 each, and have $22 replaceable voice coils on this easily blown part which i now have a collection of)
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on March 08, 2019, 03:05:09 PM
i have not determined if the 4061s at lower voltage have reduced max SPL but this would not surprise me. in these moderate-volume tests they sound identical to my ears

Once upon a time I came across a DPA table listing 406x specifications at lower than nominal powering voltages.  As is typical with most microphones and as you speculate, at lower powering voltages, max SPL, sensitivity, and distortion thresholds decrease, until at some point the microphone stops working entirely.  Self-noise remains more or less constant if I recall correctly.

I thought I'd posted the table somewhere at TS but am unable to find it searching the site, web-wide, and this computer.  It's out there somewhere.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 08, 2019, 03:44:15 PM
yeah i get mixed answer from DPA and lectrosonics about using 5V mics. some people find it ok, others find it objectionable, its application dependent

the 4063, while similar to 4061 in self-noise is midway between the 4060 and 4061 in max spl handling/dynamic range 

so its quite possible that a 4063 would be almost a tossup vs a 4061 run at 4V on noise/dynamic range
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on March 09, 2019, 05:04:58 PM
I've recorded 17 shows with the 4061/SPDR combo so far including My Bloody Valentine, a band that is quite loud; I just checked it in RX and there were no detected clipped samples. I'm not sure if that's helpful information or not, but I'm happy with the results. Any compromise in sound (if it's actually there) is, for me, more than offset by the ease of getting in the door.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 09, 2019, 06:04:22 PM
have you ever taken it thru a metal detector? i did 3 shows a few weeks back and only brought it in for 1 as the other 2 had walk-thrus. i used the d:vice instead
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on March 10, 2019, 10:03:47 PM
have you ever taken it thru a metal detector? i did 3 shows a few weeks back and only brought it in for 1 as the other 2 had walk-thrus. i used the d:vice instead
I haven't tried going through a metal detector with it on my body, but I've been to 2 shows with metal detectors, I simply put it in the basket with my wallet and phone  and no one looked twice.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 11, 2019, 12:18:48 AM
ive thought about this, i need a sticker to cover up the giant "digital recorder" label

maybe the venue metal detectors are like TSA and weed. its 'contraband' but they dont care, they are too focused on weapons
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 20, 2019, 09:34:16 AM
as it is now.. it is useless as a bit bucket. Reclocks everything to the sample rate selected in the menu (48 or 96K). i tested it with 44.1, 48, 88.2, 96, and 192K inputs and it always writes it at the speed selected in the menu. It appears to be a feature, not a bug, as the resulting files play at correct speed

nice unit, but for the price... bit bucket was a feature i wanted. otherwise its just another handheld for the most part  :tomato:
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on March 20, 2019, 10:01:22 AM
Times have changed.  Modern high-quality re-clocking can provide a more robust, less jittery, and less problematic data path between devices without the prior negative repercussions, solving the problems reclocking traditionally imposed.  Look at how most high quality DACs now use asynchronous mode and how that is trickling down to lower cost DACs.

Not saying this particular implementation is better or worse, only that it needn't necessarily be a bad thing and can be advantageous if done correctly, and Lectrosonics is likely to do a pretty good job of it by reputation.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 20, 2019, 10:34:44 AM
dont get me wrong, the noise floor is very low on line in. on a test feeding it balanced signals from +13 to +24 dBU and adjusting the SPDR input level to peak within a few dB of FSD, the silent portions were damn near -100 dB RMS

digital input was actually noisier than line in. i was running the AD2K hot, taking advantage of its great meters to make sure it peaks at -1dB to get a good test. the spdr digitally fucked with it, and hard limited it. i was attempting to use AD2K as a reference but it came out worse. need to grab a real bit bucket and retest

(https://i.imgur.com/rWHPTLe.png)



Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: Gutbucket on March 20, 2019, 10:47:41 AM
That's not good.  Is there perhaps some SPDR setting which could have increased digital input gain above unity?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 20, 2019, 10:47:57 AM
so some pros:
rugged
compact
good battery life
easy interface
reasonably foolproof recording
low noise floor
has decent PIP and 3rd wire mic power


cons:
six times the cost of other handhelds of similar function. Has some unique features but perhaps not enough to justify cost
resamples digital input
no way to turn off low cut filter
no way to turn off limiter
non-standard inputs require custom cabling
fair amount of metal for those concerned about that
anemic headphone output
difficult to judge what the signal path actually looks like
like most handhelds, mic power voltage is low. cannot power mics requiring 5V to full spec
Powers schoeps CMRs but at the very lower limit of their spec, reducing output and likely headroom relative to higher voltages
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 20, 2019, 10:49:33 AM
That's not good.  Is there perhaps some SPDR setting which could have increased digital input gain above unity?

no real settings related to digital input other than sampling rate selection. it locks on the signal and records what i assumed was raw data, but alas, no.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: tim_k on March 21, 2019, 10:49:10 PM
Not really so applicable to music taping, but one feature that is extremely important for me (and the target audience in general) is timecode input. It is super accurate and I'd say that adds about $500 to the cost of the unit. The headphone output is pretty lame though. I also don't like how it loses time, date, timecode when you shut it down.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: noahbickart on March 21, 2019, 11:19:04 PM
why does it make sense for there to be an aes/ebu input that can't simply write the data from that input?

What digital auto gain + limiting is done? Can you measure?
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 22, 2019, 03:26:43 AM
The waveform is visibly different than parallel digital signal going to known good bit bucket. I have no idea how to measure distortion. It appears it’s not compressing the material the digital input is actually somewhat similar to the source material which is heavily compressed. Definitely adding gain tho, I trust the ad2k meters with my life
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on March 23, 2019, 10:46:52 AM
so some pros:
rugged
compact
good battery life
easy interface
reasonably foolproof recording
low noise floor
has decent PIP and 3rd wire mic power


cons:
six times the cost of other handhelds of similar function. Has some unique features but perhaps not enough to justify cost
resamples digital input
no way to turn off low cut filter
no way to turn off limiter
non-standard inputs require custom cabling
fair amount of metal for those concerned about that
anemic headphone output
difficult to judge what the signal path actually looks like
like most handhelds, mic power voltage is low. cannot power mics requiring 5V to full spec
Powers schoeps CMRs but at the very lower limit of their spec, reducing output and likely headroom relative to higher voltages

Thanks for the research you’ve done on this recorder. Where I live in this rural area makes it impossible to test anything without buying. And I hate the pita of returns.  I was attracted by the SPDR’s small size and was going to order one. But when I went on another forum to get info, I encountered the company rep who was such a dickhead that it put me off the product.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dactylus on March 23, 2019, 12:15:23 PM

Thanks for the research you’ve done on this recorder. Where I live in this rural area makes it impossible to test anything without buying. And I hate the pita of returns.  I was attracted by the SPDR’s small size and was going to order one. But when I went on another forum to get info, I encountered the company rep who was such a dickhead that it put me off the product.

^
Which forum did you go to to gather info on on the SPDR?  If the info was valuable I wouldn't mind reading it too.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: dogmusic on March 23, 2019, 06:25:26 PM

Thanks for the research you’ve done on this recorder. Where I live in this rural area makes it impossible to test anything without buying. And I hate the pita of returns.  I was attracted by the SPDR’s small size and was going to order one. But when I went on another forum to get info, I encountered the company rep who was such a dickhead that it put me off the product.

^
Which forum did you go to to gather info on on the SPDR?  If the info was valuable I wouldn't mind reading it too.

I think it was jwsoundgroup.
Title: Re: Lectrosonics SPDR Stereo Dig Recorder
Post by: jerryfreak on March 27, 2019, 12:43:45 AM
ok it took me a while to process these but see if you can pick them out. ill give it a few days before i upload the key to which samples are which

link: https://drive.google.com/open?id=11H8CDOgwZxvyIi-BZRsp-Gb42qDyQ4sx

notes:
sample 1 = OG wav before being played digitally thru benchmark dac1. 4 tracks of different sound. all were 16/44 flac releases other than the steely dan track which was originally played thru the DAC at 24/96. i resampled it to fit it into a single wav after the fact for comp purposes

samples 2 thru 9 are all analog into one of the following recorded at 24/48, try to guess:
-balanced out of DAC1(~+24 dBU)>SPDR analog in
-balanced out of DAC1(~+24 dBU)>AD2K>spdif> known good bit bucket
-balanced out of DAC1(~+24 dBU)>AD2K>AES>SPDR (resampling AES input)
-unbalanced out of DAC1(~+13 dBU)>Edirol R07
-balanced out of DAC1 > SPDR at highest level i could (minimum gain on recorder). I ran the SPDR input level as low as i could and cranked the output level of the DAC1 as high as i could to get it the hottest signal i could with decent levels peaking above -10 dBFS
-simultaneous to the SPDR high level test above, I ran unbalanced out of DAC1 > sony PCM-A10 at what would be a level about -11 dBU below the balanced levels  to SPDR above. (low gain on recorder, decent levels peaking above -10 dBFS).
-balanced out of DAC1 > SPDR at low level (max gain on recorder). I ran the SPDR input level at its max (max gain on recorder) and turned the output level of the DAC1 as low as i could to get it the lowest signal i could that the SPDR could still record at decent levels peaking above -10 dBFS)
-simultaneous to the SPDR low level test above, I ran unbalanced out of DAC1 > sony PCM-A10 at what would be a level about -11 dBU below the balanced levels  to SPDR above. (high gain on recorder, decent levels peaking above -10 dBFS)


original recorded files are provided as well as files normalized in soundforge to match OG wav input (as close as possible without hitting FSD, as original wav was <0.5 dB peaks, and some of the ADCs took liberties). i bookended the 4 songs with 10 second silent tracks, and so 5-10 seconds of silence from DAC are included at the beginning and end of each sample so you can check out the noise floor if you desire. maybe save that for last after you pick a favorite