Wow. Didn't know any of that stuff. Sounds like he was intimately involved in the creation process and not just the recording/mixing. Thanks for the info.
I'm not sure how many rock musicians can read music. Bobby Keys, the saxophonist, couldn't. Many, many of the old blues guys couldn't. Guitar players generally don't need to read music as they're playing chords and licks in the key. If you learn to play by ear and imitation, not sure you need to read music. I've played in bands for 30+ years and never once have I had a written piece of music to play by - and I read music fine. You figure out the key, the chord progression, the basic feel of the solo and you play. You don't need the written music to play by. It surprises me a little that both McCartney and Lennon played piano and didn't learn how to read music. Most of the keyboard players I've played with learned by taking lessons and, therefore, were required to learn how to read music. Guess they were both self-taught?