How can we get more audio resolution from Apple TV 4K?
I read it somewhere (maybe even on here). I don't have an Apple TV, so this is all hearsay. I found a page that mentions it tho:
page about apple tv 4k:
This is perfectly normal, and is because the Apple TV models 4 and 4K decode the Dolby Digital signal on board the Apple TV itself and then sends raw PCM format audio downstream to the receiver.
The big problem with these devices is that if you can't get them to output PCM, then we are left with 5.1 DTS at best, and more often 5.1 DD, which is only 640kb/s. Now, non of the streaming services are doing TrueHD, but most of them at least do DD+. Note that when Netflix says "Atmos", it's not "Atmos on TrueHD" like a blu-ray would have: it's "Atmos on DD+". We don't get high bitrate streams from the internet, unfortunately. Still, DD+ is better than DD, as long as your source can decode it, or you have an Oppo in between.
Before I had the 861, I was using my Oppo as the processor, and I had all my devices plugged into a 4K switch that output to the HDMI-In of the Oppo. So I'm pretty sure that you could plug your Apple TV into the Oppo.
However, my bad luck with devices like the HDFury are primarily because I've been trying to push my PS4 Pro through them, doing 4K@60Hz HDR. When I dropped the signal to 4K@60 non-HDR, they worked fine. So if your device is "just" doing movies, then one of those should be fine.