In early 2012, Philip Glass was assigned to score music for the film but was replaced by Clint Mansell in the June of that year.

[1][2] Mansell became a part of the project when Chan-wook attended one of his live concerts at Largo in Los Angeles, contacted him for a private meeting and asked him to see the film which he was currently editing.

[5][6] He used piano and strings as the primary instruments for the film's ambient soundscape, contrary to his synth scores he had composed for his previous ventures.

[7][8] Two of Glass's piano compositions, which he curated before his exit, were featured in the film's end credits.

[11] Jeremy Kay of The Guardian described Mansell's score as "eerily dynamic", while Matt Goldberg of Collider called it as "luscious and foreboding".