The majority of the HD programming, and I think the main Showtime & Encore, along with what you mentioned; AND only when the program was produced with it, not just 24/7. I mean some shows just don't have the 5.1 regardless of the channel they are on. Sometimes, the networks are the best example, the show may be in 5.1 originally, but it is not sent that way to DirecTV, nor is it sent to you that way from DirecTV. I hope I haven't confused you more; LOL!