If you are serious about Surround Sound Music; this is a must have. Put it at the top of your list. Its recorded in 5.1, but what sets this apart is that it was recorded in surround sound; not Re-mixed from analog or digital: The Flaming Lips, Yoshimi Battles the Pink Robots. ( go to its menu and click on extras). If you don't have a properly setup 5.1 audio system, or greater, don't bother. (although it comes with a 2nd disc that is 2 channel). I use it in the vehicle.