[alsa-devel] USB-Audio.conf routing and dmix

[sylvain.bertrand at gmail.com]

Hi,

I have a bose USB audio 5.1 device, a generic USB audio device.

I noticed that the proper channels routing was missing from the default generic
USB pcm, but dmix was used. And for the surround pcms I noticed it was the
other way around!

I did modify the default pcm to include a routing plugin. I put 8 channels in
the routing plugin. I guess the proper way would be to detect the hw card
number of channels and select a route plugin configuration with the correct
count of channels (maybe their is a function to get that info?).

I linked the surround51 and surround71 pcms with the 'disable-able' dmix
section from the default pcm.

I did not touch the surround40* pcms, surround pcms which are specific to some
cards and the iec958 ones.

http://filebin.ca/214UTT8fBnUm/USB-Audio.conf


regards,

-- 
Sylvain BERTRAND