alt Hacker NewsObscure "learn it by ear" guitar story...
Upon hearing Eruption for the first time, the story goes that Tony MacAlpine learned to play the finger tapping section by PICKING IT because he didn't know finger tapping was a thing. Only after seeing Van Halen in concert did he realize what Eddie was doing.
If memory serves me right, I read this in either Guitar Player or Guitar World magazine back in the late 80s or early 90s. Whether Tony was embellishing or not is unknown.
Similarly, Ben Travers didn't have a delay pedal, so learned to pick the delayed parts on Pink Floyd's "Run like hell" when he was younger, since taken to ludicrous speed: https://www.youtube.com/watch?v=1CY0_HG8J5M