[lxc-users] [Lxc-users] LXC and sound in container -

[John]

On 25/12/13 15:33, TuxRaiderPen wrote:
> On Friday, November 15, 2013 04:50:58 John wrote:
>> On 09/11/13 15:12, brian mullan wrote:
>>> I've searched the web for 2 weeks now and can find no documentation
>>> describing steps to configure "sound" in an LXC container.
>> Here is what I do. It's just ALSA (not Pulseaudio) but I do run a
>> desktop in a container and it works for me.
>>
Apoligies for late response to this post - it fell off my radar. I was 
busy eating turkey on the 25th December!!!
> Very interesting! !! THANK YOU!
>
> I am interested in sound device use inside LXC containers, under ALSA *only*,
> so I have a few questions...
>
> Is this sound *output* only ???
>
> Have you tried using :
>
> 1) Line in
> 2) Mic In
> 3) ALSA plugins:
I have thus far only tried sound output, as that is all that I needed.
If I get a chance I may try out a few tests of sound input - I can't see 
why it wouldn't work...
> I use something like this:
>
> asound.conf
> pcm.onboard{
>      type hw
>      card 0
> }
> ctl.onboard {
>      type hw
>      card 0
> }
> ### Dsnoop both channels
> pcm.dsnoop_onboard {
>      type dsnoop
>      ipc_key 32
>      slave {
>          pcm "onboard"
>          channels 2
>          period_size 320
>          rate 48000
>          buffer_size 8192
>          format S32_LE
>      }
>      bindings {
>          0 0
>          1 1
>      }
> }
> ### Dsnoop splited channels
> pcm.onboard_left {
>       type dsnoop
>       ipc_key 32
>       slave {
>           pcm "onboard"
>           channels 2
>       }
>       bindings.0  0
> }
>
> pcm.onboard_right {
>       type dsnoop
>       ipc_key 32
>       slave {
>           pcm "onboard"
>           channels 2
>       }
>       bindings.0  1
> }
>
> ### PLUGS ##
> ### used with darkice
> ### device = plug:plug_onboard_left
> pcm.plug_onboard_left{
>          type route
>          slave.pcm "onboard_left"
>          slave.channels 1
>          ttable.0.0 1
> }
> pcm.plug_onboard_right{
>          type route
>          slave.pcm "onboard_right"
>          slave.channels 1
>          ttable.0.0 1
> }
>
>
> I then feed these pcm.plug_onboard_right to some software to process each
> plugin...
>
> I am not so much interested in SOUND OUTPUT, but CAPTURE of audio via a
> software package and then feeding it onward...
>
> I am very interested in your solution as it uses ALSA only, as I may be using
> KUbuntu, highly customized, but first step I do is
>
>   sudo apt-get purge pulseaudio
>
> So I am very interested in your solution and getting access to the ALSA
> plugins....
>
> Hmmm.. maybe it would be best to get a few of those USB fob sound cards and
> just assign each to a specific LXC container, and then put the asound.conf into
> each container and thus each container could do two encodings... hmmmm...
>
> Thanks again for your input on ALSA based sound in LXC!
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users
>