[mythtv] Ticket #1104: multi channel audio support

[Paul Catchpole]

MythTV wrote:
> #1104: multi channel audio support
> -------------------------+--------------------------------------------------
>  Reporter:  Mark Spieth  |        Owner:  ijr 
>      Type:  enhancement  |       Status:  new 
>  Priority:  minor        |    Milestone:  0.21
> Component:  mythtv       |      Version:  head
>  Severity:  medium       |   Resolution:      
>   Mlocked:  0            |  
> -------------------------+--------------------------------------------------
>
> Comment(by anonymous):
>
>  I am using markspieth's .asoundrc file, and it is working great.
>
>  But I have two problems:
>
>  1. Sound in MythMusic "crackles" a little bit. Changing volume does not
>  help.
>
>  2. If the volume of PCM (I have no Master) is on 0 (zero), I can still
>  hear some sound on the speakers. Sound is gone only if I mute it directly
>  in alsamixer. MythTv's muting does not actually mute the sound, but it
>  sets it to zero.
>
>  I have no Master in alsamixer, and I thought about putting a softvol
>  device called Master, to be able to use it in MythTv. I used this code,
>  but it does not work:
>
>  pcm.!default {
>     type             softvol
>     slave.pcm       "ch51dup"
>     control {
>         name "Master"
>         card 0
>     }
>  }
>
>   

The below is my asound.conf for the fake volume master - works fine. 
Fakerear is my equivalent of your ch51dup.

HTH, PC

pcm.softvol {
    type            softvol
    slave {
        pcm         "fakerear"
    }
    control {
        name        "SoftMaster"
        card        0
    }
}