Here\'s one possible solution. 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 second line and save. It will look like that:
; Sound renderer
System.PlugIns.iSoundRender = crystalspace.sound.render.software
Now open PlaneShift and you should hear music.
If this is configured correctly then try looking in the pssetup.