Hello all, I'm Mark new to site (introduction in correct forum ) anyhow, I have a couple of questions for you all to see what's the best thing I can and learn from you all. Here's my hardware/equipment: Reciever: Sony STR-DH830 Blu Ray : Sony BDP-S570 Speakers Infinity BU-2, 7 Speakers and 1 Sub-woofer.(really loud by the way...) TV: Mitsubishi DLP-65' 1080P My questions are the following: I can't seem to figure out how to get 7.1 sound of my equipment, any thoughts? DTS-HD, DTS and some sound fields aren't recognized when using HDMI cable, Why is this? Should I use an optical cable or HDMI? What's the best? When I used the Optical Cable the most I got was DTS and it showed it on the receiver's screen, now that I'm using HDMI I dont see it, sometimes the words "Dolby Digital 5.1" flash by and then it goes to PLIX-M5. Although I hear all speakers working the receiver doesn't display the audio channel that I use, all i get is PLIX -M5 display with the Dolby logo and a small x next to it, my BDP-S570 is directly connected to the receiver, receiver is connected to TV. Now, my apologies for being such a ''noob'' on the matter but any ideas/help is greatly appreciated. Mark.