Thanks so much for the advice. This is exactly the kind of thing I was looking for. It has, however, brought up another question i'm hoping you (or someone) can answer. I notice on one of the receiver's description it says "WILL NOT SUPPORT 4K TV'S OR SOURCES! "
Perhaps I don't understand how one configures external sound, but I assumed, perhaps incorrectly, that I would be hooking up the external sound system directly to the TV and the TV would direct the audio portion of the programming to the sound system. With that statement, I am getting the idea that the way to hook up an external sound system to the TV would be to connect the audio receiver directly from the AV source. Is this the way to do it?
I have three sources of programming that I play on my TV. One is DirecTV with the receiver and DVR box, another is the Smart TV itself which does Netflix, Youtube and perhaps later.. other offerings and the last one is my external HD where I keep my videos and which is connected via HDMI cable to my TV through my Android based media box with KODI.
Right now, there isn't enough 4K programming on DirecTV to temp me to pay for it and my broadband is too slow for me to stream anything 4K but I'd like to be able to accommodate it should things change in the future so would like to better understand the configuration setup. (See, now you know what a total noob I am)