PulseAudio
From Indie IT Wiki
HOWTO: FIX: PulseAudio Will Not Start
sudo nano /etc/pulse/client.conf ; autospawn = yes
http://askubuntu.com/questions/70560/why-am-i-getting-this-connection-to-pulseaudio-failed-error
How to change pulseaudio sink with “pacmd set-default-sink” during playback?
Why?
http://www.vidarholen.net/contents/blog/?p=21
How?
http://techpatterns.com/forums/about2179.html
Network
http://elehack.net/writings/howto/audio-server
http://askubuntu.com/questions/28039/how-to-stream-music-over-the-network-to-multiple-computers