USB audio sound card (PCM2702)

veteran · 28th November 2006, 12:51 PM

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.

moe29 · 28th November 2006, 03:39 PM

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

...sorry, i'm a bit clueless

pinkmouse · 28th November 2006, 06:23 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, 06:26 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, 02:05 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, 07:22 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, 08:32 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, 11:26 AM

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, 11:30 AM

Version 2 - TDA1543 integrated.

DcibeL · 29th November 2006, 07:12 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

.

28th November 2006, 12:51 PM	#1
veteran diyAudio Member Join Date: Feb 2004 Location: Poland	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. __________________ Simple audio solutions blog.unisonus.com

28th November 2006, 06:23 PM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Veteran, just a quick idea. How about a simple kit to convert optical outputs to SPDIF. I'd buy a couple! __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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28th November 2006, 03:39 PM	#2
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	Looks pretty sweet. Do you have to write drivers for it? ...sorry, i'm a bit clueless

29th November 2006, 02:05 AM	#5
Spasticteapot diyAudio Member Join Date: Jan 2006 Location: Wisconsin....what did you expect?	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.

29th November 2006, 07:22 AM	#6
DcibeL diyAudio Member Join Date: May 2003 Location: Saskatchewan	What's the asking price? Also, does the PCB include a place to connect coax SPDIF output from the PCM2702?

29th November 2006, 08:32 AM	#7
DcibeL diyAudio Member Join Date: May 2003 Location: Saskatchewan	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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