[Bugs] #800 UNSP: Set audio capture volumes

[SugarLabs Bugs]

#800: Set audio capture volumes
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    Reporter:  alsroot                    |          Owner:  tomeu      
        Type:  enhancement                |         Status:  new        
    Priority:  Unspecified by Maintainer  |      Milestone:  0.86       
   Component:  sugar                      |        Version:  0.84.x     
    Severity:  Unspecified                |     Resolution:             
    Keywords:                             |   Distribution:  Unspecified
Status_field:  Unconfirmed                |  
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Comment(by tomeu):

 Replying to [comment:6 eben]:
 > Replying to [comment:5 tomeu]:
 > > Maybe we should have those controls in the device side of the frame. I
 think people right now are a bit disoriented because an activity can lower
 and mute the capture device and other activities cannot record any more. A
 control per activity wold fix it, but we probably cannot expect all
 activities will do the right thing.
 >
 > Right, that's what I'm suggesting with the camera and mic devices. I
 think that's really the best solution.
 >
 > I don't think the ability to set this globally should preclude the
 ability for activities to have their own input gain adjustments. I'm not
 sure I understand what you're saying about one activity preventing another
 from recording. The global input level should be just that; activities
 shouldn't have control of the master volume slider. They should only be
 able to adjust the gain on the signal once they get it at the master
 volume.

 I'm afraid in linux, apps can modify the mixer as they wish, and they seem
 to be already doing it, because from .uy come reports that some activity
 is muting the input channel and other activities stop being able to
 record. People is now "fixing" this by going to the terminal and running
 alsamixer to unmute the mic.

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Ticket URL: <http://dev.sugarlabs.org/ticket/800#comment:7>
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