Make: Online : DIY: USB Sound Card

DIY: USB Sound Card

In the past, making your own sound card could have been a difficult task. The best part about this project is when you are all done, it is as simple as plug and play. You don't need any drivers under XP or Vista. If you know how this would work under Linux, please leave a comment below. Thanks!

Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You dont need to install any driver for Windows XP and Vista, because they are already inside. This is really plug and play.

Make your own USB Sound Card

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Comments

Oldest comments listed first.

Posted by: Oliver on May 19, 2008 at 3:28 AM

Just as easy as,

modprobe snd-usb-audio in Linux

kldload snd_uaudio in FreeBSD.

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Posted by: Marc de Vinck on May 19, 2008 at 7:27 AM

Thanks for the info!

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Posted by: cjc15153 on May 19, 2008 at 10:12 AM

If I wanted digital optical out, would I just attach the led & coupler between the Delta/Sigma and the DAC or is it more complicated?

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Posted by: wackyvorlon.myopenid.com on May 19, 2008 at 10:47 AM

Check my other comment, which appears to be held for moderation. The newer chips have SPDIF outputs.

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Posted by: Marc de Vinck on May 19, 2008 at 10:58 AM

@wackyvorlon

Nothing is being held?
Thanks for the info on the new SPDIF chips.

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Posted by: wackyvorlon.myopenid.com on May 19, 2008 at 11:10 AM

Hum! Must have got lost. Anyway, the PCM2702 according to TI's site is obsolete. The PCM2704 is it's replacement, link:

http://focus.ti.com/docs/prod/folders/print/pcm2704.html

And it does indeed have SPDIF out. An interesting thing, the 2705 and 2706 chips can be interfaced to with I2S - a version of I2C intended for sound. It'd make them fairly easy to talk to with a microcontroller.

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Posted by: Marc de Vinck on May 19, 2008 at 11:19 AM

Thanks for the link! I2S, I have to look into that?

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Posted by: Meysam on September 18, 2008 at 10:28 AM

pcm 2704

hello
I want to build this "USB sound card".
i need to one ic pcm 2704 for this project.
thanks

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