Haha that is a great summary, I was disappointed that skimming the paper, it didn't appear to have a link to an online AP course that individuals can try for themselves. I'd happily put in 25 hours over 8 weeks and report back. I'm slightly surprised that no one in these threads has claimed they developed AP through the David Lucas Burge "Develop Perfect Pitch" course that was in 2-page ads in music magazines all through the '80's and '90s.
I have what I consider advanced RP, thankfully my first guitar/bass teacher 40 years ago gave me a list of intervals in popular music (half-step: Jaws, whole step: Sound of Music 'Doe a deer', minor third: Smoke on The Water and so on). I progressed to recognizing interval combos and fairly complex jazz chords. I played in a short-lived group with 2 brilliant AP-ers, and despite their efforts to lose me, I could match them in playing any song by ear (that I'd never played before), though I could only occasionally name a note just by hearing it, or sing, say, an 'A' and have it spot-on to the cent.
I have what I consider advanced RP, thankfully my first guitar/bass teacher 40 years ago gave me a list of intervals in popular music (half-step: Jaws, whole step: Sound of Music 'Doe a deer', minor third: Smoke on The Water and so on). I progressed to recognizing interval combos and fairly complex jazz chords. I played in a short-lived group with 2 brilliant AP-ers, and despite their efforts to lose me, I could match them in playing any song by ear (that I'd never played before), though I could only occasionally name a note just by hearing it, or sing, say, an 'A' and have it spot-on to the cent.