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-   -   USB audio sound card (PCM2702) (http://www.diyaudio.com/forums/swap-meet/91186-usb-audio-sound-card-pcm2702.html)

veteran 28th November 2006 11:51 AM

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.

http://www.unisonus.com/images/usb_audio_1.jpg

http://www.unisonus.com/images/usb_audio_2.jpg

moe29 28th November 2006 02:39 PM

Looks pretty sweet. Do you have to write drivers for it?

...sorry, i'm a bit clueless :)

pinkmouse 28th November 2006 05:23 PM

Veteran, just a quick idea. How about a simple kit to convert optical outputs to SPDIF. I'd buy a couple! :)

pupsik46 28th November 2006 05:26 PM

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).

Spasticteapot 29th November 2006 01:05 AM

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.

DcibeL 29th November 2006 06:22 AM

What's the asking price? Also, does the PCB include a place to connect coax SPDIF output from the PCM2702?

DcibeL 29th November 2006 07:32 AM

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 29th November 2006 10:26 AM

2 Attachment(s)
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 ;)

veteran 29th November 2006 10:30 AM

2 Attachment(s)
Version 2 - TDA1543 integrated.

DcibeL 29th November 2006 06:12 PM

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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