[alsa-devel] Problems with gain controls

[James Courtier-Dutton]

2009/8/9 James Courtier-Dutton <james.dutton at gmail.com>:
> 2009/8/9 Tony Vroon <tony at linx.net>:
>> On Sun, 2009-08-09 at 11:28 +0100, James Courtier-Dutton wrote:
>>> pulse seems to do a very bizarre thing. The single master gain control
>>>  within pulse changes both the alsamixer PCM and Master controls.
>>
>> That behaviour is by design, and described as a feature here:
>> http://0pointer.de/blog/projects/oh-nine-sixteen.html
>>
>
> Maybe so, but how do I disable it?
> I want pulseaudio doing software volume control, and not touching the
> alsa hardware controls.
> You might ask why I want it disabled, that is because it is a broken
> method. One cannot have a the gain control on the input to a device
> linked to the gain control on the output of a device. If one ever has
> two different inputs, E.g. from the CD, it just messes things up.
> With the current method, all I get is noise from the speakers. If I
> kill pulseaudio, I get nice sound again.
> I don't understand why pulseaudio cannot see how much of a broken idea
> the current method is.
>
I found out how to disable it.
I edited
analog-output.conf.common and changed "merged" to "zero" for the PCM control.