This is a beautiful commercial first aired during the Super Bowl this last winter. I first REALLY watched it yesterday.

I dug through the Internet to find the soundtrack, and, apparently, it's a work specifically commissioned by Audi...as in there's no group signed to a record label making it distributable. However, Audi has received enough positive response to the track that they've temporarily released it via their website. You have to visit Audi's website, then wait until the videos are finished playing.