By the way, my technical opinion on the problem is that the built-in Netflix App on Bell Fibe's receiver is doing some downsampling from 5.1 to something else. This explanation is obvious to me since when I watch the exact same show/movie on Bell's Fibe or on Apple TV 4K, the sound is totally different. On the Apple TV 4K I definitely ear native 5.1 audio and on the Bell Fibe receiver, sound is lower, muffled and I am pretty sure it's downsampled somehow to 2.1 or something else. I can't see any sound setting specific to the Netflix App into Bell Fibe's receiver however and my receiver is set to 5.1 native in the global setting. So I don't understand.