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CM6631 usb audio interface .... any good ?
CM6631 usb audio interface .... any good ?
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Old 8th June 2018, 01:53 AM   #691
tdtsai is online now tdtsai  Taiwan
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Join Date: Feb 2011
Hi
Sorry it only for CM663xA version. Non A Version is not supported.

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Originally Posted by l3VGV View Post
Helow mr. tdtsai!

Is the SDK you posted compatible with cm6631 non A version?
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Old 8th June 2018, 04:49 PM   #692
sgpu is offline sgpu  United Kingdom
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Join Date: Jan 2012
Location: Nottingham, UK.
I'm building an isolated CM6632A based board. Notable specs. Some layout to go though...

Linear Technology LTC4365 Power protection
Linear Technology LTM2884 USB & Power isolation for CM6632A & clocks
Linear Technology LT3042 for clock power
Golledge GXO-3306L/A 24.5760MHz
Golledge GXO-3306L/A 45.1584MHz
Newava Technology Inc. S37211 spdif isolation
TI & NVE DS90LV048 IL715E Isolated in and out i2s over RJ45

It was designed to perform part of a home made scope...
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Last edited by sgpu; 8th June 2018 at 04:51 PM.
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Old 18th June 2018, 11:57 AM   #693
5a5 is offline 5a5  Russian Federation
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Hello tdtsai!
A lot of thanks for the SDK!

Could you help me with some issue? I configured the usbDAC example as CM6631a device, changed VID and PID according to a firmware that successfully works with the generic C-Media USB 2.0 driver, then built the firmware and flashed it. The issue is that now generic C-Media driver can't assotiate with my device. I can't find out what I do wrong. :-( If I revert the firmware to the original version from the config tool it is ok.

Last edited by Mooly; 18th June 2018 at 12:02 PM. Reason: Remove unknown text
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Old 18th June 2018, 12:02 PM   #694
Mooly is offline Mooly  United Kingdom
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CM6631 usb audio interface .... any good ?


5a5 I have edited your post and removed a lot of irrelevant text and links.
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Old 18th June 2018, 12:23 PM   #695
5a5 is offline 5a5  Russian Federation
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Thanks Mooly. Sorry, I didn't see any, but I will be careful next time.
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Old 18th June 2018, 01:31 PM   #696
Mooly is offline Mooly  United Kingdom
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CM6631 usb audio interface .... any good ?
No problem This is what appeared.
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Old 19th June 2018, 04:21 AM   #697
tdtsai is online now tdtsai  Taiwan
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Hi
You can not change VID and PID. The SDK has it's own driver, the driver is on Windows Update. It can not use generic C-Media USB 2.0 Driver.

Quote:
Originally Posted by 5a5 View Post
Hello tdtsai!
A lot of thanks for the SDK!

Could you help me with some issue? I configured the usbDAC example as CM6631a device, changed VID and PID according to a firmware that successfully works with the generic C-Media USB 2.0 driver, then built the firmware and flashed it. The issue is that now generic C-Media driver can't assotiate with my device. I can't find out what I do wrong. :-( If I revert the firmware to the original version from the config tool it is ok.
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Old 19th June 2018, 04:43 AM   #698
Markw4 is offline Markw4  United States
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Is it possible or has anyone figure out to configure it to allow SPDIF input? Seems it can do SPDIF out, if it could to input as well that could be very useful. I don't think there is a low-cost SPDIF I/O to USB board around anymore so maybe this could fill what looks like a void in the marketplace.

Also, how about MIDI I/O? Might that be possible?
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Old 19th June 2018, 07:34 AM   #699
tdtsai is online now tdtsai  Taiwan
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Hi
If you need SPDIF out function, you can use configuration tool to config SPDIF out. By the way if you use configuration tool to config it. It still use I2S out but it copy I2S out signal to SPDIF pin out. If you only want to use SPDIF out, you can use SDK to do it. Also if you need MIDI In/Out please use SDK to turn on MIDI function.

Quote:
Originally Posted by Markw4 View Post
Is it possible or has anyone figure out to configure it to allow SPDIF input? Seems it can do SPDIF out, if it could to input as well that could be very useful. I don't think there is a low-cost SPDIF I/O to USB board around anymore so maybe this could fill what looks like a void in the marketplace.

Also, how about MIDI I/O? Might that be possible?
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Old 22nd June 2018, 08:28 AM   #700
3lite is offline 3lite  Poland
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An update for my project

Base PCB:

Click the image to open in full size.

It can run in both USB Audio Class 1.0 or 2.0 (selectable by a jumper).

Dimensions and pinout are pretty much the same as Amanero.

Addon with an FPGA:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

It extends the base PCB with following features:

- Actual playback of 768 kHz and 705,6 kHz.
- DSD64, DSD128 and DSD256 support via DoP with seperate outputs and DSD clock (DSDL + DSDR + DSDCK).
- Serial DATA output. It does allow to connect directly any PCM DAC, e.g. in NOS mode.
- I2S output.
- Left-justified output.
- BCLK rate can be chosen between 64x and 32x Fs. Rate of 32x Fs allows to play 768 kHz files via PCM56 or 384 kHz via TDA1541(A) using serial DATA outputs.
- SPDIF output (generated on the fly directly from the incoming stream). It can generate the stream up to 384 kHz.
- Every format has an inverted output as well (connecting bunch of DAC's to create XLR output is not an issue).
- MCLK rate of 128x Fs for every sampling rate except for 705.6 kHz and 768 kHz (which is 64x Fs).
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