I have a Sonos Arc, Gen 3 Sub, & two SL Ones hooked up to my Samsung QN90B TV. I can see my settings are correct and Dolby Atmos is turned on. When I play Amazon movies or shows that have Dolby Atmos I can only see Dolby Multichannel PCM 5.1 in my Sonos app. I spent over 2 hours with Samsung and they told me that my settings are correct and that Dolby Multichannel PCM 5.1 is just a name coming from the TV and that if my Dolby Atmos is on and I am using the HDMI eArc port, the sound is in Dolby Atmos. Is this correct?
Answered
Samsung's telling me that Dolby Multichannel PCM 5.1 is Dolby Atmos
Best answer by GuitarSuperstar
Prime Video recently changed their subscription tiers. The basic tier no longer supports Dolby Atmos audio. You need to upgrade to the ad-free tier.
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