The music in the film was provided by a local group known as Tractor, and marked the first time Lynch would work with Alan Splet, who was recommended to the filmmaker by the soundman of "The Alphabet". Initially, Lynch and Splet intended to use a collection of sound effects records for the film, but after going through them all they found that none of them were useful. So, Lynch and Splet took sixty-three days to make and record their own sound effects.