FM Synthesis Libraries

I'm thinking about using a realtime FM synth for music and sound effects in my next game. I'd write a library myself, but I don't want to waste my time if there's already something good out there. The thing is, google turned up no results. Am I going to have to get cracking on my own?

>>16
Not really. The point of a limited soundchip is "we know we can make instrumental sounds with FM because we've been doing it since before we had dedicated synthesis hardware, and this is cheap."