[alsa-devel] Mixer volume/decibel mapping

[Raymond Yau]

2010/6/8 Sebastian Holtermann <sebholt at web.de>

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> Am 08.06.2010 03:03, schrieb Raymond Yau:
>
> >
> >
> > https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4883
> >
> > Pekka Lampila reported that when he set -40dB and only get back -9999999
> by
> > his program alsa_mixer_test.c
> >
> > I don't have emu10k1 so don't know whether this is a bug of alsa-lib or
> not
>
> I also get a big jump from -39.60dB to -99999.99 dB for some emu10k1
> sliders when I move them to the minimum although their advertised
> minimum is -40dB. This looks like a way to express log ( 0 ).
>
>
it seem that only "Wave Master" has mute switch , the other "Wave Rear" ,
"Wave Center/Lfe" and "Wave side" only have volume control

Have you try the patch : emu10k1: allow high-resolution mixer controls


http://git.alsa-project.org/?p=alsa-kernel.git;a=commit;h=4daf7a0c0b3dd3c2e2ec829ecee8608d04d67773