USB audio sound card (PCM2702) - diyAudio
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Old 28th November 2006, 11:51 AM   #1
veteran is offline veteran  Poland
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Cool USB audio sound card (PCM2702)

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.

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Old 28th November 2006, 02:39 PM   #2
moe29 is offline moe29  United States
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Looks pretty sweet. Do you have to write drivers for it?

...sorry, i'm a bit clueless
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Old 28th November 2006, 05:23 PM   #3
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Veteran, just a quick idea. How about a simple kit to convert optical outputs to SPDIF. I'd buy a couple!
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Old 28th November 2006, 05:26 PM   #4
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Quote:
Originally posted by moe29
Looks pretty sweet. Do you have to write drivers for it?

...sorry, i'm a bit clueless
Nope, just plug in. Drivers are integrated into OS (Windows 2k, XP, Linux).
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Old 29th November 2006, 01:05 AM   #5
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Very nice!

Just curious, though - why not use a TDA1543 or similar DAC with a PCM2706's I2S output? I've heard it's of much better quality than the PCM27xx line.
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Old 29th November 2006, 06:22 AM   #6
DcibeL is offline DcibeL  Canada
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What's the asking price? Also, does the PCB include a place to connect coax SPDIF output from the PCM2702?
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Old 29th November 2006, 07:32 AM   #7
DcibeL is offline DcibeL  Canada
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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).
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Old 29th November 2006, 10:26 AM   #8
veteran is offline veteran  Poland
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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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Old 29th November 2006, 10:30 AM   #9
veteran is offline veteran  Poland
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Version 2 - TDA1543 integrated.
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Old 29th November 2006, 06:12 PM   #10
DcibeL is offline DcibeL  Canada
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Quote:
Originally posted by veteran
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
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 .
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