I’m experimenting with VCV Rack, combining and modulating audio files with each other in funny ways, and I’m trying to find a good general definition or method of “subtracting” a clean signal from an affected version of itself.
I’ve used an envelope follower from a dry signal to duck/side-chain a wet signal, and this is the closest thing I can find to what I’m imagining, but I’m looking for something a little more surgical.
Phase inversion however is a little too precise. Mixing a signal with its exact inversion is silence; mixing slightly different wet audio inverted just produces quiet signals, not interesting ones I think.
“Dry” vs “wet” signal isn’t exactly what I mean here. In my question here, folks mentioned Soothe and Isotope Declicker’s weird switch feature of outputting JUST the removed sound. In this case, the clicks are exactly what I’m after: the “difference” between the declicked (“wet”) track and the original (“dry”).
Similarly, the link posted here downsamples an mp3 and subtracts it from the original file, exporting just the differences/compression artifacts. The artifacts would be what I’m after.
Anyway I’m looking for a more generalized or other approaches of subtraction, ideally in a patchable environment. Thanks for any techniques or ideas!
ISO: ghosts, silhouettes, fuzzy gaps, isolated backgrounds, etc