Colin Guthrie schrieb: > 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? So it's supposed to work at least? That's the code snippet which gives the above values. long min, max; snd_mixer_selem_get_playback_dB_range(mVControl, &min, &max); long vleft, vright; snd_mixer_selem_get_playback_dB(mVControl, SND_MIXER_SCHN_FRONT_LEFT, &vleft); snd_mixer_selem_get_playback_dB(mVControl, SND_MIXER_SCHN_FRONT_RIGHT, &vright); Wolfgang
