Although it would be odd, it is a possibility that when the player is configured in the audio menu to use the 5.1 analogue output, then the player read only the multichannel area of an SA-CD disc and don't even try to read the stereo 2 channels area. Stereo only SA-CDs would then not be read at all. A check is in order. I will try stereo only SA-CDs on my DV-868AVi, which should have about the same built-in software than the DV-565, at the earliest opportunity.