https://fadedinstruments.com/slimer-fm/Slimer FM turns your DAW into a modular FM mega-instrument. Traditional FM synths provide carrier and modulator oscillators to generate sounds, but Slimer FM has no modulator – just an audio input. Using simple routing in your DAW of choice, any synth/drum machine/effects chain can become the modulators – inspiring some weird ass sounds. Essentially, your whole DAW becomes an FM synthesizer.
How it works?
https://youtu.be/4fPt_2CWuEQ
Sounds pretty interesting and for that price it's pretty much a no-brainer!