volume keybindings

[Amadeus W.M.]

Sorry to say, but I had to uninstall pulseaudio yet again. So I'm back to 
alsa and I feel much better. Except that my <Alt>Page-up/down shortcuts 
don't work anymore. I guess they used to control pulse volume. Does 
anyone know how to bind the sound keyboard shortcuts to the alsa mixer? 
I'm guessing I have to do something in gconf-editor, but I don't know the 
magic words.