Comment by ilamont

This is true. I read an interview with Hans Zimmer who has scored dozens of Hollywood films (including Blade Runner 2049) and when he first arrived in London in the 1980s he couldn’t read music. Not sure about now.

ETA: he did eventually learn how to read music:

“I learnt to read music after I bought the Roland MC8 Microcomposer, because it then became essential for me. … I learnt music by ear and have picked up most of my technical knowledge through the sessions and gigs.”

https://www.muzines.co.uk/articles/ronnys-electro-music-caba...