[pulseaudio-discuss] [SOLVED] usb sound card: PCM has 8 channels, thats too much & cannot submit datapipe for urb 0

David Henningsson david.henningsson at canonical.com
Sun Nov 20 19:19:39 PST 2011

On 11/20/2011 11:24 AM, Tanu Kaskinen wrote:
> AFAIK USB doesn't have enough
> bandwidth to support uncompressed 8-channel audio,

Hmm, a long time ago - this was on Windows XP - I remember using a 
http://www.esi-audio.com/products/gigaportag/ and I don't think we 
installed any special USB drivers for that.

8 channels * 48000 Hz * 16 bit ~ 6 MBit/s, and we're talking about the 
12 MBit/s version here, so I guess it should be enough even with some 
packet overhead, but maybe some of the more broken USB host chips have 
some problems with it?

David Henningsson, Canonical Ltd.

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