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?

>>25
No, you missed the point. Sure we like to work with constraints, in a way that defines art. But those constraints are largely natural ones, and FM synthesis is no exception.