The original music composed by Justin Hurwitz featured various instruments, including theremin (which Hurwitz learned to play; his performance is in the final score) and a Moog synthesizer, along with an Echoplex tape-based delay unit, which give the score its uniqueness. The Echoplex, which features a sliding playback head that can shift the delay (echo) of the signal sent to the recording head, is used to create single or multiple repeats from information temporarily recorded on a tape loop, which was used for a number of pop recordings in the seventies. Hurwitz also rerecorded a string orchestra being played back through a Leslie rotor cabinet to create special sound effects.

Film

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