The Townhall's very complete Halo coverage page notes a correction regarding the demo's music. While originally reported as having been done in house, it has now been clarified by Bungie's Max Hoberman that Total Audio was indeed responsible for the enthralling theme. I'm looking forward to hearing what else they produce for Halo, and how they move from Myth's orchestral, fantasy music to something more suited to an action packed science fiction setting.