To get sound:
You have to open up notepad, open file, and go to the the PlaneShift main directory. Make sure at the bottom it says \'all files\' and then open psclient.cfg and then look for this:
;Sound renderer
;System.PlugIns.iSoundRender = crystalspace.sound.render.software
Delete the \';\' (semi-colon) at the begining of the line and save. Now open PlaneShift and you should hear music.
Hope this helps :-).