Removed the pre-Carbon Mac OS 9 audio code, so Mac OS 8 is officially unsupported now. :) The "USE_RYANS_SOUNDCODE" portion, which is what remains, has been the active codepath for years now without complaint, and was used in several shipping OS X titles before the CoreAudio support obsoleted it, so it's a good fallback to keep around for testing if nothing else. This code should still work on both OS 9, and PowerPC/Intel Mac OS X.