I have a Kenwood HTB-504 home theater in a box system. Today I popped in one of my DVDs that has DTS in to see what the hype is about. And I can't get the reciever to go into DTS or DD modes, I think that it is because I am not using optical connections. Is this right? The TV that I have doesn't have s or component video connections so I am just using RCA cables to connect everything, I believe this is called composite video? It's conneced like this. I have one single RCA running from the monitor connection on the reciever to the yellow rca on my tv. I have a set of 3 rcas running from the back of my DVD player to the DVD connections on the reciever. And finaly I have the set of three rcas coming from my PS2 to the video 2 connections on the reciever. (I'm saving the video 1 connections for when I hook up my vcr) I want to know two things, I am using all analog connections, is this preventing me from hearing Dolby Digital and DTS? And will I notice a large quality difference by moving to the digital connections?