Just curious. I have my surround mode for the receiver set to AUTO. When I put in a dvd with dolby digital 5.1 surround it will automatically go into that mode. If the disc is DTS capable I switch to it in the dvd-disc menu & it goes into that mode. However I've notice some dvds when I pop it in the reciever will only display PROLOGIC DVD. When I see this, I switch my dvd-player sound to PCM & put the receiver into PL II Movie mode. I guess not all dvd's are created equal? Is this the correct method for the best sound for dvd's that are not DD5.1 or DTS?