"Bessel's Trick is a Neural Audio Plugin for fast, live Tone Transformation of Musical Instrument sounds using Frequency Modulation (FM) synthesis.
https://github.com/fcaspe/BesselsTrick
It's JUCE but not LV2 yet. Developer is stuck on adding an LV2 target, but tbh I really don't have the time to dive in.
"Features:
FM Synth controllable from an Audio Input. Try feedng it voice, violin, solo guitar, trumpet.
Designed for live playing. Fast sound generation, 1.3ms inference latency
6-oscillator FM engine. Based on the classic Yamaha DX7.
Comes with many pretrained sounds!
Tweakable FM controls on real time.
VST3 and AU plugin formats available"