Might I suggest a couple of simple things to eliminate some of the potential problems? And sorry if you have already done this - I didn't see any references when scanning the thread.

Run a level calibration on the 568.2 and make sure all the speakers are working as they should (L/C/R/LS/RS/Sub). That eliminates (or identifies) all downstream comms and SPDIF issues.

Run a DD test disc on the player that identifies channels ("this is the left front", "this is the right front", etc.) with the player set to decode DD to LPCM and any output connection except HDMI removed from the player. That eliminates (or identifies) any connection problems from player via HD621 to 568.2

Last edited by Gianni; 2012-03-11 05:10. Reason: Added remove non-HDMI connection
In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.