Marty O'Donnell again composed the original score for the game. Some pieces of the game's music are produced with a much larger real orchestra than any pieces in the prior two games. For example, the music for the announcement trailer was recorded with a 60-piece orchestra and a 24-piece choir. "Halo 3" is the first game in the series to feature custom soundtracks, allowing players to replace in-game music with their own choices. The "Halo 3 Original Soundtrack" was released on November 20, 2007. Included on the soundtrack is an original composition submitted by fans and judged by Nile Rodgers, Michael Ostin, and Marty O'Donnell.