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Author Topic: Sound Devices MixPre-3 and 6, Part 5  (Read 124536 times)

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Offline Chuck

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #165 on: July 31, 2018, 12:16:34 PM »
Gordon, I bought that cable too. It took forever to get here. I put the USB-A side into the battery and the USB-C side into the MixPre. When I turn on the power my MixPre tries to boot, but doesn't make it all the way. I'll have to test it again. No biggie, because I do have a couple of 2x USB-C cables that work fine. Is there a setting that needs to be changed?

I know it's not supposed to work, but has anyone found a USB-A (battery out) to USB-C (MixPre in) battery/cable that fully powers the MixPre (green light)? The MixPre Remote Powering thread isn't there anymore... ???

Again, this one works for me.  http://a.co/dWMWfuP

I tuck the cable THROUGH the bar in the front left corner and then plug it into the USB-C.  It tends to get in the way of know #1 and #2 a bit less but it helps with strain relief since it is right-angled on both ends.

Hmmm... OK. It must be my battery then, because I bought that cable and this battery https://www.amazon.com/gp/product/B01KYUDAN4/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 and my MixPre-6 won't even power up with that cable. I tries to boot, but all I see is the firmware page then it powers down and tries to reboot again endlessly.

Are you using C on the mixpre side and A on the battery?  I have the same battery and the below cable that came from SoS when I bought my mixpre from him.  He no longer had the cable in his ebay sales history so we were unsure the exact one..  Anyway it works!  The sticker on it says "0110006j" so googling I found these on amazon denmark:

https://www.amazon.de/geflochten-rechts-gewinkelt-Ladeger%C3%A4t-Daten-Sync-Kabel/dp/B06VXB1W8P?th=1

So I googled "1M 2A Braided 90 Degree Right Angled USB 3.1 Type C Charger Data Sync Cable".  Looks like this is it, from hong kong on ebay....

https://www.ebay.com/itm/1M-2A-Braided-90-Degree-Right-Angled-USB-3-1-Type-C-Charger-Data-Sync-Cable-Cord/332056692769?hash=item4d501f0821%3Am%3Am_IHzv_LCgQI2iVwZVqqKhQ&var=541089383410&_sacat=0&_nkw=1M+2A+Braided+90+Degree+Right+Angled+USB+3.1+Type+C+Charger+Data+Sync+Cable&_from=R40&rt=nc&LH_TitleDesc=0



That said I also have the c>c Jbell linked to. 


2018-07-31 08.47.33 by Gordon Wilson, on Flickr


2018-07-31 11.24.57 by Gordon Wilson, on Flickr


2018-07-31 11.25.04 by Gordon Wilson, on Flickr


2018-07-31 11.25.09 by Gordon Wilson, on Flickr
Reality is merely an illusion, albeit a very persistent one.

Microphones: AKG C 480 B comb-ULS/ CK 61/ CK 63, Sennheiser MKE 2 elements,  Audix M1290-o, Micro capsule active cables w/ Naiant PFA's, Naiant MSH-1O, Naiant AKG Active cables, Church CA-11 (cardioid), (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlebox, Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Sound Devices MixPre-6, iRiver iHP-120 (Rockboxed & RTC mod)

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline Gordon

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #166 on: July 31, 2018, 12:19:30 PM »
hmm.  works fine here.  you know you have to hit the button on the battery to power it on.  Also I have AA in the sled as backup so perhaps that helps it boot then switches to usb??
Microtech Gefell M20 or M21 > Nbob actives > Naiant PFA > Sound Devices MixPre-6 II @ 32/48

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Offline mjwin

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #167 on: July 31, 2018, 01:42:49 PM »
Hmmm... OK. It must be my battery then, because I bought that cable and this battery https://www.amazon.com/gp/product/B01KYUDAN4/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 and my MixPre-6 won't even power up with that cable. I tries to boot, but all I see is the firmware page then it powers down and tries to reboot again endlessly.
Regardless of cable or USB power source, the MixPre should behave in a defined way and not go into this uncontrolled loop.

But this is very interesting, as my MP6 has (had) the same problem at times.

When the problem occurs, do you have a secondary power source  i.e. battery sled connected?  If so, the MixPre should bring up a screen saying  "USB power is low, do you want to use "battery power?" If you choose "yes", all should be fine with a green battery indicator on screen. If you choose "no", the device should still power-up but in low-power mode with an amber USB power indicator.

Before chucking your USB cable, or tearing your hair out (or both), you could try the "load factory defaults" system reset:
Today I called tech-support and the tech suggested I try a reset which consisted of holding the headphone knob and the channel one knob down while powering up and keeping them held down until I got to the home screen.

I don't know if you have loaded and saved your own presets, but I have a feeling (unconfirmed) that there's an elusive bug somewhere in there which causes this boot-up loop if the preset file becomes corrupted in some way.  With my MP6, the factory reset seemed to cure the problem until I loaded my bad preset file...
« Last Edit: July 31, 2018, 01:46:18 PM by mjwin »

Offline Chuck

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #168 on: July 31, 2018, 01:51:29 PM »
Hmmm... Thanks for posting. I'll do some more research and let you know what I find. I have two USB-A to USB-C right angle cables that people say work for them, but don't work for me. I haven't tried to reset the device yet, because it functions great for me except for that USB issue, which really isn't a huge bother.
Reality is merely an illusion, albeit a very persistent one.

Microphones: AKG C 480 B comb-ULS/ CK 61/ CK 63, Sennheiser MKE 2 elements,  Audix M1290-o, Micro capsule active cables w/ Naiant PFA's, Naiant MSH-1O, Naiant AKG Active cables, Church CA-11 (cardioid), (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlebox, Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Sound Devices MixPre-6, iRiver iHP-120 (Rockboxed & RTC mod)

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline jbell

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #169 on: July 31, 2018, 02:56:07 PM »
I bought a couple of usb a > usb c cables that others claimed worked for them, but never worked for my deck.  I only tried them since I had a bunch of usb a batteries.  Eventually I gave up and bought an approved Anker and use usb c > usb c cable. 



 



Hmmm... Thanks for posting. I'll do some more research and let you know what I find. I have two USB-A to USB-C right angle cables that people say work for them, but don't work for me. I haven't tried to reset the device yet, because it functions great for me except for that USB issue, which really isn't a huge bother.
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Offline checht

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #170 on: July 31, 2018, 03:21:04 PM »
Never had any issues using this USB A -> C cable or the following C -> C cable with the Monoprice battery. Both are from Amazon:

A - C
https://www.amazon.com/gp/product/B077JLLCW1/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

C - C
https://www.amazon.com/gp/product/B01MSMOMAR/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
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Offline Chuck

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #171 on: July 31, 2018, 06:03:11 PM »
Thanks for all the help guys. My findings...

When I pushed the headphone knob and channel one knob in at the same time and rebooted the MP6 it didn't erase the firmware or any of the stored pre-sets. It did bring up the "Would You Like to Run on Battery Power" message which is good. So, the power up and power down cycle is history.

Neither of these USB-A to USB-C cables:

https://www.amazon.com/gp/product/B06XP5T78F/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

https://www.ebay.com/itm/3FT-Right-Angle-Micro-USB-or-USB-C-to-Left-Angle-USB-2-0-Charger-Sync-Data-Cable/162327537413?ssPageName=STRK%3AMEBIDX%3AIT&var=461341515784&_trksid=p2057872.m2749.l2649

Run on full power with this battery:

https://www.amazon.com/gp/product/B01KYUDAN4/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
 
I get the orange bar with any combination of those items. Which is no big deal. I'm just reporting my findings.

This cable gives me the green bar with that battery:

https://www.amazon.com/gp/product/B01GMZP2I6/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

So, I ordered another one as a spare.

Reality is merely an illusion, albeit a very persistent one.

Microphones: AKG C 480 B comb-ULS/ CK 61/ CK 63, Sennheiser MKE 2 elements,  Audix M1290-o, Micro capsule active cables w/ Naiant PFA's, Naiant MSH-1O, Naiant AKG Active cables, Church CA-11 (cardioid), (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlebox, Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Sound Devices MixPre-6, iRiver iHP-120 (Rockboxed & RTC mod)

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline borjam

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #172 on: July 31, 2018, 08:08:18 PM »
I have been playing with my MixPre 3 a bit, hooking it to a laboratory power supply, a multimeter and an oscilloscope.

The thing really needs power: more than 850 mA with a single channel recording and the voltage at 5.2 V (a reasonably healthy pack of NiMH). Lowering voltage the unit's internal voltage regulators pulled even more current, reaching 950 mA.

I wouldn't use batteries with just a USB-A output. The advantage of USB-C is that there is less uncertainty.
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Offline Chuck

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #173 on: July 31, 2018, 08:36:24 PM »
I just ran 4 of these: https://www.amazon.com/Powerex-MHRAAAI4-Imedion-Rechargeable-Batteries/dp/B003LWP0OU/ref=sr_1_7?ie=UTF8&qid=1533083379&sr=8-7&keywords=batteries+powerex through the Refresh option on this: https://www.amazon.com/dp/B000RSOV50/?tag=ahjoo-20 I tested them twice and got 2 hours of run time on my MP6 recording 4 channels with 2 Microtech Gefell M300's (P 48, DIN 45596, IEC 268-15): 3.3 mA) the other two channels line input and I got 2 hours of run-time.

The batteries are about 8 years old! So, to say the least, I'm impressed with how well it handles power management.
Reality is merely an illusion, albeit a very persistent one.

Microphones: AKG C 480 B comb-ULS/ CK 61/ CK 63, Sennheiser MKE 2 elements,  Audix M1290-o, Micro capsule active cables w/ Naiant PFA's, Naiant MSH-1O, Naiant AKG Active cables, Church CA-11 (cardioid), (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlebox, Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Sound Devices MixPre-6, iRiver iHP-120 (Rockboxed & RTC mod)

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline Chuck

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Reality is merely an illusion, albeit a very persistent one.

Microphones: AKG C 480 B comb-ULS/ CK 61/ CK 63, Sennheiser MKE 2 elements,  Audix M1290-o, Micro capsule active cables w/ Naiant PFA's, Naiant MSH-1O, Naiant AKG Active cables, Church CA-11 (cardioid), (1) Nady SCM-1000 (mod)
Pre-amps: Naiant littlebox, Naiant littlekit v2.0, BM2p+ Edirol UA-5, Church STC-9000
Recorders: Sound Devices MixPre-6, iRiver iHP-120 (Rockboxed & RTC mod)

Recordings on the LMA: http://www.archive.org/bookmarks/ChuckM
Recording website & blog: http://www.timebetweenthenotes.com

Offline checht

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #175 on: August 02, 2018, 08:41:02 PM »
Ignorant question:

How do you de-select a source when editing a headphone preset? I mistakenly added the L mix to one, and can't figure out how to undo.

~Thanks, Chris
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Offline morst

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #176 on: August 03, 2018, 04:56:59 AM »
Ignorant question:

How do you de-select a source when editing a headphone preset? I mistakenly added the L mix to one, and can't figure out how to undo.
I could be super-wrong since this is from "memory" and not referencing the machine or the manual, but I think you roll the cursor around with the headphone level knob, and click it in towards the machine to toggle each source being on or off in each headphone mix.




???
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Offline junkyardt

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #177 on: August 04, 2018, 10:32:41 AM »
Ignorant question:

How do you de-select a source when editing a headphone preset? I mistakenly added the L mix to one, and can't figure out how to undo.

~Thanks, Chris

yeah, I asked about this same issue in this thread a few weeks back:


Lastly, is anyone else having trouble editing the headphone preset options once they're already set? I assume that for editing the HP presets you use the headphone volume knob to scroll left and right, then click in on the knob to either select or deselect a channel you want assigned to that preset, right? For me, pressing in on the HP knob works to select and deselect certain channels, but not the ones that were already selected for that preset, if that makes sense. In other words, the channels I selected the very first time I made that HP preset appear to be permanently locked to that preset. This seems like a bug to me, very weird!


i haven't figured it out either. the way morst describes it is the way it SHOULD work, but it doesn't. once you have selected certain channels as part of a HP preset, it appears impossible to deselect them. very odd, i think it might be a bug. i'm going to email SD about it soon. fwiw, i've noticed the same issue in the outputs menu (choosing which channels are fed through the stereo out).

Offline checht

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #178 on: August 04, 2018, 11:22:26 AM »
^ Exactly my problem.

Calling SD monday.
Schoeps MK41 x 2, MK22 x 2; Vanguard V1s matched pair; Niaint x8
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Offline borjam

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Re: Sound Devices MixPre-3 and 6, Part 5
« Reply #179 on: August 04, 2018, 05:03:51 PM »
This is what I’ve found.

There is a small bug in the headphone preset edition. Fortunately there is a workaround.

Depending on how the recorder is configured you can route inputs pre or post fader to the headphone output, or just pre fader if you are not using the mixing facilities, ie, your gain settings are in basic mode. In that case you can make only selections that make sense.

For example, my recorder is configured as follows:

Channel: Advanced
Gain: Basic
Headphone: Advanced
Record: Advanced
Metadata: Advanced
Outputs: Advanced

I record only ISOs, not a stereo mix. So my headphone preset has inputs 1, 2 and 3 assigned to both headphone channels. Nothing fancy.

With the gain in basic mode it makes no sense to talk of LR mix, because the knobs become gain controls rather than mixer faders.

The bug is: I have tried to select the L and R channels from the stereo mix assigning them to headphone outputs and it works, while it shouldn’t. The trouble is, once I have selected them I can’t deselect them so I have effectively broken my headphone preset.

Fortunately there is a workaround: change gain to advanced mode so that the knobs become mixer faders again and hence the LR stereo mix makes sense, and you will be able to deselect them again.

I guess the same can happen if you have routed post fader inputs to the headphone outputs and you have changed gain to basic mode or something of the sort. I’ll report it to SD so that they can fix it in the next version.

"Don't worry about the drums. I'm a percussionist, I can play on carton boxes" - Peer Wyboris

 

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