[pulseaudio-discuss] PA overamplification

[Valent Turkovic]

On 1/13/08, Tanu Kaskinen <tanuk at iki.fi> wrote:
> On Sun, Jan 13, 2008 at 07:17:39PM +0100, Valent Turkovic wrote:
> > Hi,
> > as I explained in my bug[1] I have problem with PA because of over
> > amplification and I need to put every application stream on 50%.
> >
> > Is there some way to define that every new aplication stream has a
> > default volume of 50% and not 100% when it starts because that would
> > temporarely solve my problem.
>
> Yes there is, put "load-module module-match" in default.pa,
> and create file ~/.pulse/match.table with one line: ".*
> 32000".
>
> The ".*" part is a regular expression matching all streams,
> and 32000 is the volume for matching streams (the value
> range is 0-65535).
>
> Better solution would of course be solving the actual cause
> for this problem. I'd guess the sound card does digital
> amplification. alsamixer shows some amplification value for
> the sliders, I don't know how reliable it is, though. But
> anyway, run "alsamixer -c0" (replace 0 with something else
> if the sound card doesn't have index 0) and if some slider
> shows positive gain, lower it. The gain is shown in the
> "Item:" line in upper left corner.
>
> --
> Tanu Kaskinen

Thank you for your suggestions, I'll pass them along to fedora
bugtracker also after I test them.

My audio chip is Conexant CX20549 (Venice), have you had some specific
issues with it?

Cheers,
Valent.

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