[mythtv] Ticket #1104: multi channel audio support

Paul Catchpole paul at paulcatchpole.co.uk
Sun Dec 9 21:37:51 UTC 2007


Ma Begaj wrote:
> 2007/12/9, Paul Catchpole <paul at paulcatchpole.co.uk>:
>   
>> 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
>>     }
>> }
>>     
>
> How do you use SoftMaster in MythTv? As I remember it is only possible
> to choose between PCM and Master
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>   
Set the mixer device to softvol, from that example.

PC


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