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Is it possible to limit maximum volume in PulseAudio? Currently, PulseAudio sets PCM channel too loud which results in distorted sound. I use aumix to turn volume down, but whenever any other sound is played (IM notification etc), PA plays with knobs, turning master volume down and PCM up.

aumix  ++++++++++++++++++++O+++++<Vol      
       ++++++++++++++++++++O+++++ Pcm            ++++++++++++O+++++++++++++


aumix  ++++++++++++++++O+++++++++<Vol  
       ++++++++++++++++++++++++O+ Pcm            ++++++++++++O+++++++++++++

I use OpenSUSE 11.2, pulseaudio 0.9.21, ALSA 1.0.21 and ALC889A sound codec.

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I had to set flat-volumes = no in /etc/pulse/daemon.conf in Fedora to stop apps from screwing with volumes. Don't forget to restart PulseAudio after the change.

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Does not help. Whenever I try to change master volume, PA maxes PCM volume. – el.pescado May 11 '10 at 20:56

There is a way to stop PulseAudio messing with your PCM level.

See for details.

My only issue with this solution is that on every boot, PA does not remember where on it's scale and will show that you're att 100% even though it is the same as when you started. To solve this just drag it all the way down, and then back up again.

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