Score scrapping
Though famed for its classical music, 2001: A Space Odyssey originally had a full score composed by Alex North, who previously worked with Kubrick on Spartacus.
The director decided late in post-production to abandon North’s compositions in favour of Strauss, Ligeti and Khachaturian - believing the movie should be “a visual, nonverbal experience”.
North wasn’t informed, and he discovered the replacement only when he attended the 1968 premiere.
His unused score remained unheard until it was released decades later on CD and later on vinyl.