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USB audio sound card (PCM2702)

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veteran

veteran

Member
Joined 2004
unisonus.com
This is my test board for PCM2702 USB sound card.

LT1115 in output stage filter. Signal path: silver mica capacitors, black gate N. Assembled and tested. Toroidal transformer designed for audio - 2x14V + 6V, shielded.

An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.
 
DcibeL

DcibeL

Member
Joined 2003
drive.google.com/drive/folders/1KDyECkAIVAuNEtKVobKmsfvtFczGqOQw?usp=share_link
Hi, just found your website, there is some nice stuff on there! However, I also found the schematic for your USB DAC, and I see that you have not incorporated SPDIF output into the design. I am really at this point looking for a USB to SPDIF converter that works well with Linux to use along with my external DAC. Currently I am using an M-Audio Audiophile 2396 soundcard, but it is finicky in some aspects for Linux use (it works, but not as well as it should/could).
 
veteran

veteran

Member
Joined 2004
unisonus.com
PCM2702 don't need additional drivers and there is no digital output included.

I have such project ready - USB to SPDiF and I2S converter (optical/coaxial). I just have to make some boards ;)
 

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DcibeL

DcibeL

Member
Joined 2003
drive.google.com/drive/folders/1KDyECkAIVAuNEtKVobKmsfvtFczGqOQw?usp=share_link
veteran said:
PCM2702 don't need additional drivers and there is no digital output included.

I have such project ready - USB to SPDiF and I2S converter (optical/coaxial). I just have to make some boards ;)
Click to expand...
Sorry, I had confused that IC with PCM2902. I would be interested in your USB to SPDIF converter board if you were to make some ;).
 
veteran

veteran

Member
Joined 2004
unisonus.com
Spasticteapot said:
Very nice!

If you could produce a super-simple PGA2311-based preamp kit with a simple serial input, I would be very interested.

Also, I know that Jan at 41hz.com is very interested in producing a PGA3211 preamp. He'd probbably be willing to pay a bit of money for rights to your design.
Click to expand...

This is my PGA2310/PGA2310 preamplifier:

An externally hosted image should be here but it was not working when we last tested it.


well, not quite a preamplifier but volume control :D

HPDAC looks really nice.
 
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