You've heard about the Halo 3: ODST Original Soundtrack right? It's dropping day and date with the game on September 22nd, 2009. Here's what Marty had to say for himself (and the soundtrack), stolen shamelessly from the official press release:
"I'm happy to be able to share all new compositions and recordings created for Halo 3: ODST," said composer Martin O'Donnell. "The music reflects the new mood, new heroes, and new story of the game. I worked with the Northwest Sinfonia for the orchestral recordings and also added some nice alto sax solos and some new guitar solos. The piano sneaks back in again a few times too, but I can't seem to help that."