@mahler123, You are correct sir. I posted here and on AVS Forum as well. I have learned that PCM is limited to 2-channel, and that SPDIF is limited to 5.1 channels. I have tried for years to send audio from my TV to the Oppo via HDMI. but it will not. The Oppo, on the other hand, will play discs and send menu information just fine to the TV via HMDI.
I have also learned that the Oppo has a feature called DTS Neo:6 that upmixes 2-channel to multi-channel analog. This sounds better than stereo for movies, but not as good as my 30-year-old AVR with Dolby Digital.
I guess it is time to buy a legit AV Processor. Thanks for your input.