RichFM is a synth mode for the 201 Pocket Piano. It’s a 6-operator frequency modulation synth! The knobs control the following:
Knob 1: Decay
Knob 2: Tone
Knob 3 : Synth preset selector. It selects from eight presets.

Polyphony: 3 voices.

Have fun!

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Revision History:
1.1 – Aug 31 2023 – 3-voice polyphony; improved voice ‘stealing’ behavior.
1.0 – Aug 25 2023.

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Listing image from craiyon.com.