This became one of my favorite techniques after I saw Jakub’s video over 1 year ago. Jakub does not use this term, but I call it recursive filtering. I’ve used the technique in many patches.
Yep - recursive filtering is a prime driving force behind my development of the Recurse module.
Yes indeed - F2 is a great choice for this technique, as it hones in on 1 or a small cluster of harmonic partials using very little CV, yet also manages to add some character.
I’ve been meaning to publish a patch that compares the suitability of various filters for this technique. I’ve had various forms for over 1 year! It deserves a demo video, but could never get around to creating one. I will try to post the patch without a video today so people can try it out.
Once my plugin is finally released to the library, I will publish another version of the patch that uses my plugin.