I have a Pioneer VSX-D509S connected to my HTPC and HDTV via the TV's optical output. I use Cyberlink PowerDVD 10 to play BluRay's and have no problems until this weeks. 5.1 surround works great on DVDs, BluRay's and HDTV recorded on the HTPC.
Problem: I tried to play a Disney BluRay title. All the prevues played fine, but when I set the audio to 7.1 - the only option - I get zero audio. Absolutely nothing.
Other BluRays have played fine - although I do not know if they were 5.1 or 7.1.
My assumption is that the receiver is too old to know what to do with 7.1 audio. Am I correct? If this is the cause, do more recent 5.1 receivers handle 7.1?