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The film's music was written by Ennio Morricone, credited as Dan Savio. Morricone recalled Leone requesting him to write "Dimitri Tiomkin music" for the film. The trumpet theme is similar to Tiomkin's El Degüello theme from Rio Bravo (1959) (that was called Un dollaro d'onore in Italy) while the opening title whistling music recalls Tiomkin's use of whistling in his Gunfight at the O.K. Corral (1957). "Some of the music was written before the film, which is unusual. Leone's films were made like that because he wanted the music to be an important part of it, and he often kept the scenes longer simply because he didn't want the music to end. That's why the films are so slow - because of the music." Though not used in the completed film, Peter Tevis recorded lyrics to Morricone's theme for the film. As a movie tie-in to the American release, United Artists Records released a different set of lyrics to Morricone's theme called Lonesome One by Little Anthony and the Imperials.