Chuckle. I still hold out hope someday you will be enticed to expand your oscillator horizons! I think I was close with XM-OP (I believe I saw a patch of yours that tried it). But the missing exponential response is a big deal - I’m working on it!
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@purf - Oh my. I just discovered another major component to the magic sound of the FM-OP. The feedback is post level. So the Level envelope also has an enormous effect on the feedback amount as well.
My FM-OP currently uses the raw waveform (sine) for feedback, pre level.
I think this is every bit as important as the exponential response, perhaps more so.
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