[tonyvdb]

Welcome to the Shack Tony,

Is your receiver saying TruHD on the display? If so then I suspect that you have either the speakers plugged into the wrong terminals on the back of the receiver (are you using a 5.1 speaker setup) or if you have a 7.1 speaker setup your only sending the receiver the 5.1 audio from the BluRay player.

 

[tonyvdb]

First of all make sure that your rear speakers are NOT connected to the Rear speaker terminals, they need to be connected to the side or main surround terminals.
The next thing to do is make sure that your receiver knows that your only running 5 channels not 7. this is done in the menu during setup.
95% of BluRay DVDs only have 5.1 uncompressed audio (the first one I have seen is the newest prince caspian movie it has 7.1)

 

[tonyvdb]

I know it sounds strange to not connect the rears to the rear terminals but in a 5.1 setup the rear ones are to be left unused. Dolby specifications actualy have no speakers on the rear wall in a 5.1 setup the back speakers actualy go on the sides about even with your seating. If you go here they explain it with a nice 3D display.
I personaly dont see the logic in that as I find it sounds more realistic if the side speakers are located on the rear walls in a 5.1 setup.

 

[tonyvdb]

Glad we could help:T

Enjoy your setup.