Among those things about computers that I most hate in the world is when something works, then doesn't work, then you get it to work but can't figure out how you made that happen. My RKR "Cassini" progressive scan DVD player somehow was at last able to provide a constant DTS signal to my 861 for "Gladiator" on the 4th attempt, having previously defaulted to DD the previous 3 times despite (I thought) going through the same ritual of selecting DTS as the audio option. Oh well, at least the DTS signal was recognized by my 861, and the center channel was working, too. Thanks to all here who gave responses. Happy New Year!