I want to throw my hat in the ring here for this audio/arc issue.
I picked up the new 5.1 Vizio soundbar setup w/the slim sub. My tv does not support arc so I used the optical cable. Setup like so:
ATV 4 hdmi to tv - optical from tv to soundbar. Sound input was set to optical on the soundbar.
I mostly played Netflix and had no issues with sound.
I tried a new setup per a user here which was this:
ATV 4 HDMI to soundbar - HDMI from soundbar to tv (no other connections). Sound input setting was set to HDMI on the soundbar.
I played Netflix again. Since the switch, Netflix sound keeps dropping out for no rhyme or reason. Stopping/pausing play doesn't bring it back. Audio in the Apple menu works fine and audio in the iTunes movie app works as well. When I play a trailer, it works fine. I go back to Netflix, it still doesn't work. Sometimes it comes back, sometimes it does not.
My point being, this is a super simple setup. It shouldn't be doing this. It works fine via optical but not HDMI and it's only Netflix.
So that means it's either Netflix or something with how the soundbar is decoding the signal from Netflix. It's very strange.
Ive switched back to optical and have had no further issues.
Last edited by KristopherSteel; 06-18-2016 at 12:13 PM.