Roku Ultra and Dolby Atmos
I just bought a Roku Ultra so I can get 4K and Dolby Atmos for my 7.1.4 surround setup. I currently subscribe to Paramount Plus and HBO Max. I was able to get Atmos but then noticed that I was getti...
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Chriswmcgee wrote:Problem with audio format on Roku Ultra 2020. I just purchased my second Roku Ultra for the sole purpose of achieving a Dolby Atmos surround sound experience with my Yamaha Dolby Atmos Reciever. I was able to get limited access to Dolby Atmos with my previous Roku Ultra 4K, however, it only worked on Disney Plus and VUDU (VUDU only streamed the Atmos track if hooked up to my 4K TV). Now that I have the 2020 Ultra I also get Netflix to stream the Atmos soundtrack. My problem is, from the advertising I have seen, Amazon Prime is also supposed to stream an Atmos soundtrack as well on the proper Atmos encoded movies/shows. I have been unable to achieve this as 5.1 surround is all I can get. My question is, does Amazon Prime have the same requirement as VUDU for properly streaming a Dolby Atmos soundtrack? This requirement being it must have a TV capable of displaying Dolby Vision/HDR10 as well to allow the Dolby Atmos soundtrack to pass. I have the Roku audio set to Auto passthrough.
What does Settings/Audio/HDMI/Auto passthrough indicate as detected? (highlight it)
What titles are you testing for Atmos in Prime?
Prime has terrible tagging, and Atmos tagging is utterly absent. Generally speaking, UHD/HDR tagged titles that DONT have 5.1 tagging have Atmos. If the UHD/HDR title has a 5.1 tag, it doesnt have Atmos.
Have you verified working Atmos in other apps? (NetFlix/Disney+/HBO Max/Apple TV/Vudu/Movies Anywhere/etc)
Auto passthrough is selected, Stereo, DD, DD+, Atmos, DTS, DTS-HD etc. are detected.
I tested Dolby Presents "Escape," John Wick 3, Mad Max, Jack Ryan. All were listed under a search for "Dolby Atmos movies 4K Prime" within the Prime App. I was only able to find 5.1 surround sound. No other formats were listed.
Netflix, Disney+, and VUDU all pass Atmos DD+ track to my AV Reciever. VUDU only does so if it is hook up to my 4K TV instead of my projector.
As I said, if you see a 5.1 tag with the UHD/HDR tag, you wont get Atmos.
If the the listing has a UHD/HDR tag, but no 5.1 tag, it delivers Atmos.
Prime only delivers Atmos with UHD/HDR, so If your Roku display is detected/configured as 1080, you wont get the UHD (4K) stream with Atmos.
