 The soundtrack for Halo 3 was released on November 20 , 2007 . O 'Donnell noted he wanted to bring back the themes from the original game to help tie together the end of the trilogy . The tracks are presented , similarly to the previous soundtrack for Halo 2 , in a suite form . Unlike previous soundtracks , where much of the music had been synthesized on computer , the soundtrack for Halo 3 was recorded using a 60 @-@ piece orchestra , along with a 24 @-@ voice chorus . The final soundtrack was recorded by the Northwest Sinfonia at Studio X in Seattle , Washington . The soundtracks were bundled and released as a box set in December 2008 . A soundtrack for Halo 3 : ODST was released alongside the game and included many of the tracks from the game . 
