[Pkg-alsa-devel] Bug#503839: Bug#503839: /usr/lib/alsa-lib/libasound_module_pcm_vdownmix.so: vdownmix from 5.1 does not incorporate LFE channel

[Josh Triplett]

On Sat, Sep 05, 2009 at 02:34:30PM +0200, Elimar Riesebieter wrote:
> * Josh Triplett [081028 09:45 -0700]
> > Package: libasound2-plugins
> > Version: 1.0.16-1+b1
> > Severity: normal
> > File: /usr/lib/alsa-lib/libasound_module_pcm_vdownmix.so
> > 
> > The vdownmix plugin suggests this for .asoundrc:
> > 
> > pcm.!surround51 {
> > 	type vdownmix
> > 	slave.pcm "default"
> > }
> 
> Could you please test:
> 
> pcm.!downmix51 {
>  type vdownmix
>   slave.pcm "surround51"
>   }
> 
>   pcm.!default "plug:downmix51"

I didn't know whether you meant to use this instead of or in addition to
the previous .asoundrc snippet, so I tried both.  With just the lines
you suggested and nothing else:

~$ speaker-test -c 6 -t wav

speaker-test 1.0.20

Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Playback open error: -16,Device or resource busy
Playback open error: -16,Device or resource busy
Playback open error: -16,Device or resource busy
Playback open error: -16,Device or resource busy
[...]

With the lines you suggested added to the stanza I mentioned in the
original report:

~$ speaker-test -c 6 -t wav

speaker-test 1.0.20

Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Segmentation fault


Either way, I don't get any sound at all.

If you had something different in mind than either of the two
alternatives I tried, please tell me what full .asoundrc to try and I'll
try it.

Thanks,
Josh Triplett