I was building a patch with the theme unstable, and I didn’t have a vco for it so I picked Erica Synths black wavetable vco. and picked an unstable filter and reverb to see what it would sound like. I used vcv pro for the song but the instrument is just stock parts and you could probably play it with your computer keyboard or whatever your setup is.. I am getting near to a new budget month if someone has a favorite paid module.