I have a Toshiba SD-5700. Problem is on some of the disc I own I am unable to hear the tracks in stereo - just surround. When I select stereo, it accepts it, but I still get sound through all speakers. I am not sure if this would be a problem with the DVD player or the discs. I figured if it was a problem with the player, then it would effect all discs. I first thought was it was a issue with the discs, but for 3 of the 8 or so I own (that have stereo tracks) to have problems seems odd. The 3 discs are: Yes - Fragile REM - AFTP Greatful Dead - AB Thanks for any help!