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Reel Rookie

Does Roku Ultra 4660x2 support Dolby Atmos?

I have an Ultra 4662x and it does NOT pass ATMOS. It’s hooked with a 2.1 HDMI cable to a  Vizio elevate sub then another 2.1 HDMI for the eARC between the tv and sb. Best I get is DTS using the Roku box. 

When I use the channels on the LG tv I get ATMOS on a number of different channels. 

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