There's one case where the player could be to blame. If it is sending the stereo information on the L&R channels, but has told the receiver it's a 5.1 signal and is filling the remaining channels with silence.

The PS3 does this in some cases, and it prevents me from being able to select ProLogic, because the receiver thinks all the channels are already in use.


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris