Hi guys, so I got everything hooked up for proper DTS sound, but still no sound. I have my moded xbox hooked up through moster optical cabel to onkyo s570 and have selected the dts audio playback on the xbox. I set the dvd input to optical. At this point the receiver should pick up the DTS signal..but it doesn't..anyone has exprience with something similar..btw dolby 5.1 is playing fine.