I first hooked up my system (pioneer dvd and amp) with the dvd audio connected via an optical digital cable. I watched I Robot and could not get dialog - only music and sound effects. Like the front speakers werent working except i had music coming out of them too. I hooked up the analog 5.1 connections and that fixed the problem. However i want to use my analog 5.1 connections to hook up to the computer. So - do alot of movies require analog 5.1 connections? Cause I Robot seemed to. I wish i could only use the digital cable to free up the analog inputs. Was that sound issue with I Robot an anamoly, or is that common?