So... I've been trying to play Deus Ex (version 1.0.3) in Classic (I've got a 1.5 GHz PowerBook G4, running 10.4.6), but the voices -- and I think the music and possibly even the sound effects, although it's harder to tell with those -- play VERY slowly

. I have no idea why it's happening, and I've tried tweaking the sound settings and giving it more (and also giving it less!) RAM. Any ideas?
Thanks!