Wasn't sure whether to ask on here on on android.stackexchange.com ... but I want to play music which is on my desktop machine through my phone. The music is coming from ext4 partition which I am happy to share on the LAN.

It should use WiFi not bluetooth (because I hope to use the bluetooth interface for other things, simultaneously).

Is it possible and what do I need to setup on the desktop (on Ubuntu 12.04) and/or my phone (galaxy nexus)?

edit: Just to clarify, I want the music to be playing from the phone, not through the desktop's speakers.