Hi,
Gareth's comment brought another question up - does Pygame have to stick with SDL libraries only?
I am looking for some time on the FMOD sound library; it seems they will support MacOS, too. It can does nearly any format known to the galaxy, and it can do things like full duplex recording (if your card allows that). I don't know if someone already has a python wrapper for that. If someone does, one we could get around the limitations of SDL sound.
Dirk