I just set up my first HT system. Its the JBL NSP1 package and the JBL PB-10 Sub. I use a Technics reciever model SA-DX750 , and a 27" Wega. Anyways I'm really strapped for cash right now so I have to use my Xbox as my CD/DVD player. I have the High Definiton Pack for my xbox also. Currently I have RCA style cables going from the L/R CD audio on the reciever to the L/R to the Xbox High Definition control Pod. Running the system like this in soround mode results to my newb ears in great sound in movies and DVD's. The Xbox also has what looks like an optical cable output on it as well. To get true digital sound out of my DVD's and music do I have to use an optical cable or what? Any other hints or tricks would also be useful Thanks!