I have just bought the following.. denon 2802 nht sb2 ( 2 sets) and NHT sc1 center channel. through this receiver im running a XBOX with the advances av pack ( has optical output and s video) and a rca satellite receiver. also has them both ... they also have regular RCA connections.. now to my questions. the 2802 has categorized inputs ( VCR VCR2 dvd etc..) and next to them it has the rca inputs and s video input . the unit also has 3 optical inputs but they are not located near the dedicated inputs ( vcr , vcr1 dvd etc..) with the receiver just know what to play for sound if i use the optical inputs and s video outputs? what i mean is.. if i leave the xbox on and the satellite will the audio mix and if so can that damage the receiver ( im guessing no ) and if i use optical in to the receiver will i have to run optical and s video out to the monitor ( gateway 42 inch plasma) ? hope i didn't confuse you as much as i confused my self also.. i played the movie Matrix through the xbox and turned on Dolby in the xbox menu.. but the receiver didn't flash Dolby or anything but analog . im using all rca inputs and outoputs right now.. is this the reason im not getting the receiver to play Dolby.. ?