Old receiver, brand new TV.
I just ordered a Vizio E65-E1 65-in. SmartCast 4K Ultra HD Home Theatre Display. I have it all set up, and the image is amazing. We watched 4K Netflix, Blue Planet, and it was truly impressive. I have an old Yamaha 6160 AV receiver I was hoping to use, but I can't get it to output audio if I use the TV apps as a source. If I hook up a PS4 to the Yamaha with HDMI, and then output the HDMI to the TV, that works. I max out at 1080p, but that was expected. I can also pass DTS from the PS4 as my output audio, and it correctly illuminates the DTS light on the receiver (I watched it change from PCM to DTS). Sound is coming out of all 5.1 speakers.
My receiver does not have HDMI ARC. But it does have an optical out (3 of them actually). I tried to have the receiver decode the audio when using the Netflix app, but it remained silent. The TV manual said I have to turn off Audio Display in order to output DTS digital audio, so I did that. I also turned off the TV speakers, and set the audio output to bitstream. Then I tried the optical cable in each of the 3 ports, but could get no sound. There is a red light in the cable, so I know it is working. Finally, I plugged the optical cable from the TV's only optical out port into the Yamaha's AUX panel on the front of the unit, just to be sure I was selecting the correct input. Nothing. I suspect it may be overriding the optical because HDMI is still connected, so I thought about pulling all HDMI cables and only having a single optical cable from TV to receiver. Would that work?
Probably the best solution is a new receiver, but this Yamaha has served me extremely well for years, I am reluctant to retire it. And the reason I want to get the Yamaha working is for the headphone jack. Cinema DSP worked really well with a good pair of Alessandro's.