Re: [LAD] Merging alsa subdevices into multichannel - Linux-audio-dev

20 Nov 2008

On Thursday 20 November 2008 13:45:41 Jens M Andreasen wrote:
...
  On Thu, 2008-11-20 at 09:00 +1300, Eliot
Blennerhassett wrote:
  Hmmm. Sorry I can't help further, I only know
how to set it up when it
 does work ;) 
 Your code actually works just fine when used directly at the C-level.
 Any chance of an annotated version - that reads a little like a brief
 tutorial - of the 4 channel merger? 
I added a section here.
http://alsa.opensrc.org/index.php/.asoundrc#Joining_devices_to_make_multich…

My code is derived from the documentation of multi plugin found here
http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html

except instead of defining separate route and multi plugins, I nest all the 
plugin defs so that only one set of $CARD,$DEV,$SUBDEV parameters are 
required. As you see in the above example, if you have fixed devices the 
setup is much less verbose.

regards

-- 
--
Eliot Blennerhassett
www.audioscience.com