[pulseaudio-discuss] Mute and unmute individual sinks in a module-combine

[Colin Guthrie]

'Twas brillig, and Lennart Poettering at 29/06/09 21:55 did gyre and gimble:
> On Sun, 28.06.09 17:09, Timothy J Massey (tmassey at obscorp.com) wrote:
> 
>> Hello!
>>
>> Still working on my multi-zone setup.  The goal is to have multiple 
>> instances of MPD playing, and being able to be routed to 0 or more zones 
>> simultaneously.  Each player is connected to a unique sink created with 
>> module-combine, with each of these combined sinks including *all* of the 
>> physical sinks.  Something like this:
>>
>> #Physical sinks for actual hardware
>> load-module module-alsa-sink device=hw:1,0 sink_name=zone1
>> load-module module-alsa-sink device=hw:2,0 sink_name=zone2 
>> load-module module-alsa-sink device=hw:3,0 sink_name=zone3 
>> #Module-combine sinks for handling each MPD
>> load-module module-combine sink_name=mpdplayer1 slaves=zone1,zone2,zone3
>> load-module module-combine sink_name=mpdplayer2 slaves=zone1,zone2,zone3
>> load-module module-combine sink_name=mpdplayer3 slaves=zone1,zone2,zone3
>>
>> For now, I have a single instance of MPD playing through sink mpdplayer1. 
>> When I start up MPD and play something, I get audio out of all three 
>> sinks.  So far, so good.
>>
>> Now, though, I would like to mute the sound in all but one of the zones. I 
>> can't simply do something like:
>>
>> set-sink-mute zone2
>> set-sink-mute zone3
>>
>> Because that would mute the outputs for those zones, and they might be 
>> (and likely are) playing music from one of the other MPD sessions.  What I 
>> want to do is tell the module-combined sink (mpdplayer1) to only send 
>> audio to one of the sinks and to mute the output to the other two sinks.
>>
>> Is this possible?  I cant seem to find a way to interact with the 
>> individual channels within a module-combine...
> 
> So basically you want to add/remove underlying sinks from
> a particular module-combine instance dynamically? 
> 
> We do that with the fully automatic mode right now. However, there is
> no way to control this manually for a specific
> instance. Sorry.

Having read the code recently I kinda figured that this may have been 
the case.

I may work on a combine manipulation UI at some point in the future as 
it's an oft requested feature and a nice easy way to control it would be 
pretty nice.

Col


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Colin Guthrie
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http://colin.guthr.ie/

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