Comment 8 for bug 192735

There seems to be nothing with mpd.

using this audio_output (I am not sure the previous one is correct.)

audio_output {
# use the pulse output
   type "pulse"
# name
   name "My Pulse Device"
}

running mpd as user mpd (what is default in ubuntu) you need to make pulse a bit more easy on permissions
Edit /etc/pulse/default.pa and add
load-module module-native-protocol-tcp auth-anonymous=1
this gives permission to everybody to use pulse.

Then start mpd

And you have music.