I don't think this is presently possible - I think all 8-channel conforming USB audio devices require USB 2.0 and the only way to get solid audio in or out of the Pi (as far as I've been able to get working) depends on slowing the USB to 1.1 speed. This is certainly just a software thing and I hope it will eventually get fixed.
OTOH I've been getting good robust stereo in and out using Griffin iMic (and there seem to be plenty of other even cheaper choices).
cheers Miller
On Tue, Jul 30, 2013 at 12:05:47AM +0800, Simon Wise wrote:
On 29/07/13 21:22, Luca Mani wrote:
To everybody, is it possible to run a pd patch with an 8 channel desk on a raspberry pi with an external USB sound card ?
Raspberry usb is not great, and some audio devices work while others do not, there is apparently an 8-channel output device that works ... search this list for details ... it seems you are most likely to have luck with basic consumer level devices. I had good results with a simple, very cheap stereo output card, but that is a much simpler setup than what you are asking for.
Features used:
Raspberry PI: Model B Audio usb sound card : Tascam us 1800 http://tascam.com/product/us-1800/
of course also the audio card needs to have linux drivers ... mostly this means that the device needs to use standard usb audio drivers not its own special driver, and looking at the tascam specs it seems to need its own drivers installed to work in windows and OSX, which is not a good sign.
Simon
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