User blog comment:Deathmanstratos/Call of Duty: Advanced Warfare "Induction" Singleplayer mission shown/@comment-1854594-20140612042359/@comment-178.85.230.54-20140612124610

It's just a trailer, surely they'll have improved sounds in the final product. I think their main goal with this trailer was to show off the graphics and some gameplay features. Music/sound is less important.