I just tried to play a Blu-ray disk that was supposedly recorded in dolby digital and only very faint sound would come out. I have an LG BD390 Blu-ray player with audio set to primary pass thru. If I set the blue-ray player to PCM, the sound is fine. I know there have been problems of compatibility issues with the 2310 model and LG players, but I've listened to other disks in dolby digital, and DTS-master audio before without any problems. Do you think this is just a bad disk or is there a bigger problem? FYI, the serial number starts with 912 (year month), and according to Denon, the compatibiltiy issues were supposed to be corrected by them.