New to Blu-Ray

[tommy81569]

I've been reading this forum for a while now, and I have a few questions. Before I get blasted with researching articles and other posts on this forum, please note that I believe I have read them all and have not reached an answer.

I have a Sony BDP-S1 run into an Onkyo TX-SR803 via HDMI. For the Blu-Ray discs that contain uncompressed audio, such as Waiting..., what setting should my receiver be set to? When I select the uncompressed 7.1, the receiver defaults to a setting, but there is no sound through the rear speakers. So, I guess first question is: Is the receiver compatible with uncompressed 7.1 or 5.1 audio tracks? And, if so, how do I set up for it? Is it a set-up in the Blu-Ray player, set-up in the receiver, a combination of both? Is the TX-SR803 even capable of passing uncompressed audio, or do I need to upgrade my receiver?

I have been able to watch movies in Dolby Digital TruHD and the sound is phenomenal, but if uncompressed is what everyone says it is, then I want to ensure I am getting what I paid for.

I would really appreciate your input.

Thanks.