Does Aruffo ever claim to have acquired perfect pitch? I followed his enormous blog as it was happening 10-15 years ago (I'm even quoted in it :)), and it was utterly fascinating to see his journey, but I never thought he actually successfully got perfect pitch.
I didn't check, maybe it is foolish, I remember him internalizing F#, played with software, have not reproduced. Lately I've noticed I can reproduce G3 (from playing harmonica), that looks like a good start.
In the linked above dissertation [1] AP have 80% accuracy (C4 to B5).
