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My TV is an lg-OLED55B7V, my Arc is plugged in to the hdmi-arc. Issue is that I get occasional micro-stutter, like a half second break, every now and then, whenever Audio In displays as Dolby Atmos (DD+).

it's not consistent or repeatable. I can watch an entire episode of Briderton on Netflix and it's perfect, re-watch the same and there is the stutter. Sometimes it seems to start stuttering only after I skip scenes.

Expanse Season 4 on Amazon seems especially bad, but again I can re-watch episodes or scenes and the experience is different.

I struggle with the notion that the TV isn't passing the audio correctly as I can get through whole shows with no stutter. I have various audio out options but none of them seem to make a difference. In a different menu I can select PCM instead of Auto, but then it drops to 2 channel.

Understand the True-HD codec needs eArc, but questions please:

a) how can I find out the codec in use by the source at any one time

b) why does Netflix detect that I'm Atmos capable if that's not fully the case

c) how do I collect diagnostics to send over

Thx

 

 

How can I find out the codec in use by the source at any one time?
While the audio is playing, in the Sonos app, go to Settings > System > About My System and scroll down to the Arc info and see what it says after “Audio In:”. And the streaming app will usually display what audio codec that particular film or show is capable of streaming in.

Why does Netflix detect that I'm Atmos capable if that's not fully the case?
Are you sure your TV cannot pass through Dolby Atmos audio via Dolby Digital Plus?

How do I collect diagnostics to send over?
https://support.sonos.com/s/article/141?language=en_US

Thx for the reply.

 

Under Audio In I just see WM: 0.

Not sure what you mean by “Are you sure your TV cannot” - it can. LG says it can, and I’ve enjoyed many hours of (lossy) Atmos with it.

Thx for the link, I sent a diagnostic a few moments after experiencing a stutter: 75705511

My understanding is that lossy (DD+) Atmos should be fine over hdmi-arc, only lossless Armos (True-HD) requires eArc, and you only really get lossless Atmos from a disc player.

 

 

You asked “why does Netflix detect that I'm Atmos capable if that's not fully the case”. It IS the case. Your TV IS capable of playing lossy Dolby Atmos via Dolby Digital Plus, which is the best audio you can get from Netflix (or any streaming service).

Yes, the best way to experience lossless Dolby TrueHD/Dolby Atmos is from Blu-ray or UHD discs, but because your TV is not equipped with HDMI eARC, you will not be able to take advantage of this unless you get the HDFury Arcana device that allows a Blu-ray player to bypass your TV’s HDMI ARC limitations and play audio directly to the Sonos Arc.

On your stutter issue, does your TV have the latest firmware installed? Have you tried using a different HDMI cable? Have you unplugged your TV and Arc from power for a minute or two since you setup your Arc? 

Latest firmware: yes it’s all up to date

Power cycle: yes, everything, several times, but again last night

Cables: I’ve tried two, currently using the one supplied with the Arc but the other one gave the same results. There’s one more I can try that I know handles 4k from my disc player, but I can’t imagine it’ll make a difference TBH.

Will give it another test tonight but I really think the diagnostics need looking at. Either the Arc has some fault, or the TV does.

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