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?

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Age is a factor in contribution? I don't think this thread came to any meaningful conclusion, so I don't see why new posts shouldn't be made to it.