I’m ‘perhaps’ in a similar position to check this, in that I have Plex, a Shield TV 2019 and an LG C9 TV - what are you watching from Plex - I’ll see what I see here.

It’s only an issue with 4K Remux content encoded with 7.1 audio. 

Hi

Can you confirm the following:

1/ You’ve connected the Beam to HDMI eARC port on your TV?

2/ Settings>Sound>Sound Out>Use Wired Speaker set to HDMI ARC?

3/ Settings>Sound>Advanced Settings>Dolby Atmos is set to ON

You may also need to experiment with the settings in Settings>Advanced Settings>Select HDMI Input Audio Format, Settings>Advanced Settings>Digital Sound Output, and Settings>Advanced Settings>eARC Support

Strange that a soundbar would trigger a Dolby Vision logo…..

I do receive the Atmos signal as confirmed by the app. However, the only issue I have is that the Dolby Vision logo keeps reappearing throughout the film. Tried with multiple files and same issue.

No such issue when playing Atmos content through something like Disney+ for example. It seems to be when it’s a particularly large file through Plex that there seems to be the issue. I’m using a high bandwidth HDMI cable so ruled that out as an issue. 

Is this something that you have perhaps ripped/encoded with some software yourself - if so, maybe try a different (updated) App like, handbrake WinX DVD, VLC etc.

@Rob871,

Perhaps see if this link may assist you too:

https://androidtvnews.com/nvidia-shield-dolby-vision/

edit: Particularly note the comment: For example, the NVIDIA Shield supports Dolby Vision profiles 5 and 8, officially.