2001: A Space Odyssey United States Library of Congress and selected for preservation in the National Film Registry. A musical score was commissioned for the film and composed by Alex North, but Kubrick ultimately decided not to use it, in favour of the classical pieces he used as guides during shooting. These included Richard Strauss's "Also Sprach Zarathustra", Johann Strauss' "Blue Danube Waltz", and music by twentieth-century composers Aram Khachaturian and Gyorgy Ligeti. Toward the end of the sequence where the HAL 9000 computer is lobotomized, it begins to play the 1892 song "Daisy Bell (Bicycle Built for Two)" by Harry Dacre, which Clarke
2001: A Space Odyssey (soundtrack) as the closing credits. The first of these is the particularly famous sequence of the PanAm space plane docking at Space Station V. Ligeti's "Requiem" is heard three times, all of them during appearances of the monolith. The first is its encounter with apes just before the "Zarathustra"-accompanied ape discovery of the tool. The second is the monolith's discovery on the Moon, and the third is Bowman's approach to it around Jupiter just before he enters the Star Gate. This last sequence with the "Requiem" has much more movement in it than the first two, and it transitions directly into