Hello again,
when I clicked on the english manual of KMix I found the desired hints for dcop commands.
The german help doesn't have the translation by now.
Yesterday I managed to implement the MM keys in KDE as script in ~/.kde/Autostart.
I first tried to create ~/.xinitrc to do this, I forget the first script line #'! /bin/bash or so and as a result I couldn't log in any more as user...
Mute:
KMix has (in KDE 3.3) a hotkey function for mute, as I found out, ...
but KMix don't want run automaticly.
Thanks for the command nethertheless.