[pulseaudio-tickets] [PulseAudio] #848: Loud noise for pa_stream_flush()

[PulseAudio]

#848: Loud noise for pa_stream_flush()
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  Reporter:  mschwendt  |       Owner:  lennart                                 
      Type:  defect     |      Status:  new                                     
 Milestone:             |   Component:  daemon                                  
Resolution:             |    Keywords:  very loud short sound on stream flushing
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Comment(by tanuk):

 Replying to [comment:6 coling]:
 > It's the default because it's a nice feature for most cases and can help
 to save power.

 With power saving, are you referring only to the reduced cpu-load in those
 cases where software volume adjustment can be avoided by using the hw
 amplifiers for stream volumes? I'm not aware of other savings. There is
 potential for more, but that potential isn't currently realized because of
 a thing that I think is a bug but someone might think it's a feature:
 currently, when nothing is playing, the hw volume is set to the sink
 reference volume. I think that's wrong, I think the hw volume should be
 set to minimum (maybe even muted?). That might save some power.

 The reason someone might think the current behavior is a feature, is that
 this way the sink reference volume is better reflected in programs such as
 alsamixer. Minimizing the volume when nothing is playing might make
 alsamixer useless for controlling the sink volume. I think that doesn't
 matter, because pulseaudio can't give any guarantees anyway to retain any
 alsa mixer settings that the user changes directly with alsamixer.

 Because of this, I think we should declare that bypassing pulseaudio and
 touching the alsa mixer directly isn't supported. This would also allow us
 to get rid of some complexity in the alsa modules, because they try to
 provide some fragile support for adapting to alsa mixer changes that are
 done by bypassing pulseaudio.

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Ticket URL: <http://pulseaudio.org/ticket/848#comment:9>
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