This is a release similar to the BlackDVD release which got real good response from people, so now we have done a 5.1 mix of the St.Anger album. So everyone that liked St.Anger here is a version that must be experienced with a 5.1 home theater system. Availible in both 5.1 Dolby Digital and DTS. Enjoy this hi-fidelity release of Metallicas St.Anger album! You haven't heard music until you heard it in surround >:) / AudiophileSD NOTE: Audio DVD must not be confused with DVD-A format. This DVD can be played back in any DVD player.