[alsa-devel] Mixer volume/decibel mapping

Raymond Yau superquad.vortex2 at gmail.com
Sat May 29 05:54:27 CEST 2010

2010/5/27 Colin Guthrie <gmane at colin.guthr.ie>

> 'Twas brillig, and Raymond Yau at 26/05/10 00:24 did gyre and gimble:
> > only one of the PA developer complain about his HDA codec has incorrect
> dB
> > range but not willing to provide alsa-info.sh
> I presume you mean me :) I had a hunt through the many mails you sent on
> the previous thread and found such a request I'd obviously missed the
> first time round. Sorry about that. Not unwilling, just unaware.
> I've attached the output to a reply in the other thread.
> > There is a patch which may affect the dB scale
> >
> >
> http://git.alsa-project.org/?p=alsa-kernel.git;a=commitdiff;h=7c7767ebe2fa847c91a0dd5551ca422aba359473;hp=29fdbec2dcb1ce364812778271056aa9516ff3ed
> Interesting. I wonder if this ties in time wise of when I noticed this
> working..... If I find time to play, I'll maybe try reverting this to
> see if it helps.
> Col
> --

seem not related to your problem

But anyone know why expose -96dB large volume scale can result in  in too
large scale in percentage representation. ?

since 96dB is the theortical dynamic range of CD audio

More information about the Alsa-devel mailing list