I’ve implemented PitchShifter. It works fine as I shift down in semitones. When I get to -12 semitones the audio disappears. At -13 the pitch starts in creasing, and sounds almost like it’s in reverse? ChatGPT suggests there are limits to this class, which sounds reasonable, but I’m not sure where the information came from the docs don’t mention this.
https://electro-smith.github.io/DaisySP/classdaisysp_1_1_pitch_shifter.html