I purchased the Panasonic E80H DVD recorder which it claims supports DVD-Audio. SO far I have purchased 2 DVD-Audio discs and neither will play out of ALL my speakers. I have a Sony 5.1 discreet receiver and the BOSE (am 15?) speakers with powered subwoofer. No matter how I configure the Panasonic I can not get anything through the back speakers. My DVD's play fine. The receiver automatically detects the audio. Does DVD-A require the receiver to have DTS? My receiver does not have DTS. Is that the problem? Can someone help me out?