Thanks for the chart which is pretty useful. One thing I'm not clear about, let's forget about DTS in regards to this, but for a regular 5.1 DVD, on a regular system that you are playing 5.1 (I can play 7.1 but don't have this set up that way), then the only and consequently best way to hear this is in dolby digital 5.1 sound? I take it there will never be a Dolby Digital 2, etc?