I'm running GK1 on Windows XP, which I installed on my iMac by using Boot Camp. The game starts up fine but I can't hear any audio, whether WAV or MIDI. I'm not sure if there is a setting on Windows that I need to fix, or something in the game I need to setup, or a driver I need to install. I already installed the drivers that came with Mac OS X that are supposed to enable sound.

I resolved the problem by installing drivers, so apparently it was not a problem with the game, but with the windows installation I had done.