So I burned a copy of my quake 3 install folder to transfer to my powerbook for when i'm not at home (it just seemed easier than doing all of that powerpc patching all over again) and it works fine on there, but no all of the sudden, even though I haven't changed ANY settings or replaced ANY files, the sound on my g5 on quake 3 sounds awful, as in, extremly high pitched and scratchy.

Any ideas on how to fix it? I've tried:

Permission repair, replace the game folder with the one I copied from the powerbook, different speakers, etc.