Long-time Halo composer Marty 'O'Donnell is not working on Halo 4. He'll be working with Bungie on whatever project they're developing. Microsoft instead has turned to Neil Davidge to score the new game's soundtrack.

Davidge's resume includes producer work on DJ group Massive Attack, score composition for movies "Push", "Battle in Seattle", and "Unleashed," and provided additional music on the film "Clash of the Titans."

“As a passionate ‘Halo’ fan, I’m incredibly honored and thrilled to have the opportunity to compose the score for ‘Halo 4,’” said Davidge.  “Music has always been at the heart of what makes ‘Halo’ so captivating and iconic. With ‘Halo 4,’ we want to build upon the franchise’s amazing legacy and create a score that captures the awe and wonder of the ‘Halo’ universe, and reinforces the deeper and more emotionally impactful journey Master Chief will embark on.”

For Halo 4, Davidge hand-picked a group consisting of a 16 person male tenor / bass choir plus 10 female Bulgarian vocalists, a full 50 piece orchestra and additional performers.

“Neil has a deep love and appreciation for the ‘Halo’ universe, and the music he’s composed perfectly captures the heroic spirit and emotional power of Master Chief’s story,” said Sotaro Tojima, audio director for “Halo 4.” “Neil is a remarkably talented composer who has a unique vision for the future of ‘Halo’ music, and I’m confident his work will spark the passion and excitement of a whole new generation of fans.”

Halo 4 is due out this holiday. Be sure to check out or Halo 4 hub page that will update throughout the month with exclusive content.