The musical score was composed by Leone’s longtime collaborator Ennio Morricone. “Deborah’s Theme” was written for a Franco Zeffirelli film but was rejected. The score is also notable for Morricone’s incorporation of the music of Gheorghe Zamfir, who plays a pan flute. Zamfir’s flute music was used to similar effect in Peter Weir’s Picnic at Hanging Rock (1975). Morricone also collaborated with vocalist Edda Dell’Orso on the score.