Not all of the music in the film was composed specifically for it: earlier music by Glass, including the "Protest" theme from his opera Satyagraha, and the Franz Kafka inspired "Metamorphosis Two" from his album Solo Piano, were also featured and credited separately at the end of the film.

[1] The album won the BAFTA Award for Best Film Music.

Michael Riesman and Nico Muhly arranged the soundtrack for piano solo.

This score was published in 2003 as a 64-paged book containing most of the tracks (excluding "For Your Own Benefit", "Vanessa and the Changelings" and "The Kiss").

In 2012, Dutch harpist Lavinia Meijer released 6 tracks from the film, on her album of Philip Glass approved transcriptions "Metamorphosis / The Hours".