I have a preenFM3, great little synth. Interestingly enough, Yamaha instruments are still called "FM" synths when they use Phase Modulation synthesis. for true

I have a preenFM3, great little synth. Interestingly enough, Yamaha instruments are still called "FM" synths when they use Phase Modulation synthesis. for true FM synthesis, things like operator feedback are impossible. (that's right, they aren't true FM synths!) FM, PM and PD are all subtypes of waveshaping synthesis. The preenFM2 & PreenFM3 are actually FM synths. And it does sound a bit different from the Yamaha stuff from the 80s and 90s!