[AvantGuy]

I want to take a long sustained prerecorded cello note on a single pitch, and bend the pitch at various pitch shift rates via automation. I'd like the freedom to do slow glissando, eg. bend an octave or more and also brief bends, say, < 1 sec. I'm thinking that an algorithm that does the long gliss properly would also work with brief bends. I believe I have to preserve formants, especially for bends that are less than a second or so with no sustain after target pitch is reached (looking for little "whoops" for some of these). There are other cases of doing long, slow bends which can sustain after the target pitch is reached).

I searched and of course found several threads on pitch shifts, ReaPitch, etc., but formants are often not mentioned or the bends are less than a semitone.
TIA very much!