Roku Device Features, Settings & Updates

Help configuring Roku device settings, using Roku OS features such as screen mirroring, adjusting display type and audio settings, using Guest Mode, and assistance with software updates.
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Level 7

Roku Ultra 2020. Atmos everywhere except Prime?

I just bought a brand new Roku Ultra 2020. I connected it to my Marantz SR6014. I have audio set to Auto Passthrough. And atmos works everywhere on that setting, but not prime?  As far as I can tell Prime is set to support Atmos on the new Roku Ultra devices... what gives?

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