[pulseaudio-discuss] Alsa's mixer interface with pulseaudio plugin

Colin Guthrie gmane at colin.guthr.ie
Tue Jul 29 02:44:09 PDT 2008

Wolfgang Rosenauer wrote:
> Hi,
> I'm just trying to implement a volume control using the Alsa mixer API.
> That works already with plain ALSA but not if PA is used.
> When using plain Alsa I'm getting the PCM mixer to work while with PA I 
> found there is only a Master mixer available which I can get but the 
> volume get functions are returning strange values.
> I'm using
>    snd_mixer_selem_get_playback_dB_range()
>    snd_mixer_selem_get_playback_dB()
> The range looks suspicious (1-140576480) but the reported volume is 0 
> what makes no sense.
> So do I need to do something different for PA or won't it work anyway?

Wild guess, but perhaps some signed vs. unsigned issue?


More information about the pulseaudio-discuss mailing list