[Bug 16454] Re: Sound still comes out of speakers when PCM volume is set to 0.

manu manuellopezibanez at yahoo.es
Sat Sep 22 13:49:36 UTC 2007


> What's very curious about this is you can get some weird behavior.
> Open up a movie in totem, then turn your system volume to 0.  You'll
> still hear sound.  But, strangely, that sound will then get quieter
> when you lower the totem volume, even though in theory everything
> should be "muted."

What is so strange? Two cases that may explain that behaviour:

* Alsamixer does not have a clue what is the maximum/minimum volume of
the device. So setting volume ~0 does not actually sets the device to
the minimum volume.

* Alsamixer defines incorrectly the relation between the master and PCM.
That is, huge changes in the master may result in small changes in PCM
volume: you change master from 50% to 0% (mixer) volume, but the PCM
goes from 50% to 25% (real) volume.

-- 
Sound still comes out of speakers when PCM volume is set to 0.
https://bugs.launchpad.net/bugs/16454
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