I have a 2017 LG OLED TV, a Marantz SR7012 and an Outlaw 5000 running a 7.2.4 Atmos setup. I read in a lot of places that Atmos through ARC was not possible but after trying a few 4K cables I was able to do it flawlessly. I tried 3 cables that claimed to carry 4K signals, one of them was fiber but they all failed. The fiber was able to pass the Atmos signal but it was very choppy and unusable. The distance is pretty far to the tv from the receiver, 30 feet. So I noticed a new fiber cable on Amazon by Ruipro that said HDMI 2.0b version. I said “ what is this? I have not heard of 2.0b. It said it was able to pass up to 32 channels through ARC, so I decided to give it a shot as a last ditched effort. I hooked it up and it works perfect for Atmos on Netflix and Amazon. It reads Atmos on my receiver now. Before I was getting DD+ on the Atmos movies. I’m sure it’s lossy but the Atmos movies sound way better than when it was DD+. Is there a big difference between the two? The 4K picture from my DVD player does not drop out sometimes like it did before with this new cable either. So, I guess what I was told forever is true, good cables really do make a difference! I just wanted to post this in case anyone else with a similar setup was frustrated by trying to do this and thought it couldn’t be done.