[pulseaudio-discuss] [Surround 5.1] distorted audio because of too high volume levels

Lennart Poettering lennart at poettering.net
Tue Nov 3 14:27:40 PST 2009

On Sun, 01.11.09 18:35, Achim Frase (achim.frase at googlemail.com) wrote:

> Hello everybody,
> I have noticed that the new pulseaudio volume logic sets the volume of
> my mixer elements in alsamixer to 100%.

Please read this for an explanation:


> I always reduced the volume a little bit so that the audio isn't
> distorted, but nowadays pulseaudio setzt the volume back to 100%.
> There are two possible solution to my mind.
> 1) Is there a way to tell PA that it should set the volume of my
> channels [(PCM), Front, Surround, Center, LFE] to 94%?

The wiki page linked above should explain why this is no desirable.

> 2) I have noticed that PA only changes the volume of the Master mixer
> element if I change the volume in gnome. Wouldn't it be better if PA
> would change the volume of all 6 [Master, (PCM), Front, Surround,
> Center, LFE] mixer elements, then my problem would also disappear.

This is actually what happens. See the same text for an explanation
how that works.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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