(From CBS Pictures)The O Brother, Where Art Thou? soundtrack was a landmark moment for bluegrass music, repopularizing a genre long written off by mainstream music fans. So can the Coen Brothers and T-Bone Burnett do the same thing for folk music with the soundtrack for Inside Llewyn Davis? We'll have to wait and see how people react to the movie, which hits theaters December 20th. But thanks to the nice people over at NPR we can hear the music early with a full stream of the new album.