You will probably claim it's not "real" perfect pitch, but many people use their tinnitus to help them. They identified their ring as having, for example, F#, and suddenly their relative pitch became absolute.

There was an interesting study that I attempted to enroll in (but unfortunately was screened out by both age and childhood instrument learning) that was looking at psilocybin potentially giving adults the ability to acquire perfect pitch:

https://www.kcl.ac.uk/research/psilocybin-research-pitch-stu...

It’s not “real” perfect pitch. It’s more like training and memorizing. It doesn’t come as naturally as it does for kids.

Yeah, the stuff on the repo is bullshit because it's ai slop.

I learned perfect pitch well after six. I know others who have too.