On the Transmigration of Souls is a composition for orchestra, chorus, children's choir, and pre-recorded tape by the American composer John Adams (born 1947). It was commissioned by the New York Philharmonic and Lincoln Center's Great Performers (and an anonymous but prominent New York family) shortly after the September 11 terrorist attacks of 2001. Adams began writing the piece in late January 2002, and the music was premiered by the New York Philharmonic on September 19, 2002, at Avery Fisher Hall.[1] The work is composed in a single movement and has a duration of approximately 25 minutes. Pre-recorded voices, increasingly distorted, list the names of some of the victims, followed by the word “Missing” after each name.[2] The work's sheet music is published by Boosey & Hawkes.