USB to I2S?

Destroyer OS. · 19th April 2006, 04:12 AM

I was thinking about building a Hag USB.... I could use it's audio out for awhile, and then I could switch over to an external DAC (Peter's premium probably). Well Peter's DAC accepts I2S which is not confentational with Jitter right?

Here is a double check

Does this unit run off of I2S?

No. It only outputs the standard S/PDIF format. No machine out there has I2S outputs. Or inputs, for that matter.

My understanding is this is the only way to go for getting a digital signal out of USB with out jitter issues...

That is a popular myth floating around the DIY forums.

jh

dsavitsk · 19th April 2006, 05:26 AM

The only chips I know of that output i2s from usb are the pcm2706 and pcm2707. They are pretty simple to use: here are a few projects I've done.

Tda1541a Nos-usb-dac
http://www.ecp.cc/NOS-USB-DAC.html

As for the jitter myth, there has been some good discussion over at diyhifi.org

pburke · 19th April 2006, 03:28 PM

USB-I2S with PMC2707:

http://www.dddac.de/ma_dac32.htm

Works like a charm on my older TDA1543 DAC, and you can use it on its own, although I wasn't very impressed with the built-in A-D.

Peter

19th April 2006, 04:12 AM	#1
Destroyer OS. diyAudio Member Join Date: Nov 2005	USB to I2S? I was thinking about building a Hag USB.... I could use it's audio out for awhile, and then I could switch over to an external DAC (Peter's premium probably). Well Peter's DAC accepts I2S which is not confentational with Jitter right? Here is a double check Does this unit run off of I2S? No. It only outputs the standard S/PDIF format. No machine out there has I2S outputs. Or inputs, for that matter. My understanding is this is the only way to go for getting a digital signal out of USB with out jitter issues... That is a popular myth floating around the DIY forums. jh

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19th April 2006, 05:26 AM	#2
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	The only chips I know of that output i2s from usb are the pcm2706 and pcm2707. They are pretty simple to use: here are a few projects I've done. Tda1541a Nos-usb-dac http://www.ecp.cc/NOS-USB-DAC.html As for the jitter myth, there has been some good discussion over at diyhifi.org

19th April 2006, 03:28 PM	#3
pburke diyAudio Member Join Date: Nov 2003 Location: Madison Wisconsin	USB-I2S with PMC2707: http://www.dddac.de/ma_dac32.htm Works like a charm on my older TDA1543 DAC, and you can use it on its own, although I wasn't very impressed with the built-in A-D. Peter

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