dbus control of volume?

[Reinhold Rumberger]

On Wednesday 17 March 2010, D. R. Evans wrote:
> Nils Kassube said the following at 03/17/2010 10:17 AM :
> > D. R. Evans wrote:
> >> In KDE3, the following command mutes the audio volume:
> >>   dcop kmix Mixer0 setVolume 0 0
> >> 
> >> What's the right command to do the same thing in KDE4 (i.e.,
> >> with
> >> 
> >>  dbus)?
> > 
> > Is it mandatory for you to use dbus? For scripts I always use
> > amixer to control the mixer settings.
> 
> The man page says that amixer is for ALSA. I don't pretend to
> understand the morass that KDE4 sound is, but my understanding
> (which could be completely wrong) is that ALSA has been
> superceded by Phonon.
> 
> Just in case my understanding is wrong, I tried one of the
> examples from the man page:
> 
> [H:N] amixer -c 1 -- sset Master playback -20dB
> amixer: Unable to find simple control 'Master',0

I don't really know too much about this kind of stuff, but you may 
want to try setting PCM. Or simply try "amixer -c 1" to see what your 
card supports.

  --Reinhold