I recently decided to use Kde4 again. I ran in a problem with phonon. It didn’t use my dmix setup. Well I got it working. Phonon detects devices with a new alsa command in the asound.conf called ‘hint’. Here is my new /etc/asound.conf and ~/.asoundrc:
pcm.!default {
type plug
slave.pcm "dmixer"
}
pcm.dsp0 {
type plug
slave.pcm "dmixer"
}
pcm.dmixer {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 8192
rate 44100 #many new cards are 48000 only
}
bindings {
0 0
1 1
}
hint {
show on
description "Onboard Soundcard"
}
}
ctl.dmixer {
type hw
card 0
}
On the lines 25-28 is the part so Phonon find it. Now you can setup Phonon with your new sound device. It has to be on top for all outputs. (I had to set all of them separately.)

