Originally Posted By arbitrageur
Some blu-ray players will send limited channels out to HDMI when the analog outputs are also used - any chance you have both HDMI and analog outputs from the player set up? Check the audio configuration of the player - it might not be configured to send the 5.1/7.1 bitstream.


And you might also check that your Blu-ray player has the latest SW updates. Maybe it's having trouble decoding the audio formats??