Amazon Prime Video app not streaming in Dolby Atmos on Roku 4800rw

 

FYI: You can get a 4k splitter/down scaler from Amazon, which with these steps will allow you to receive more Dolby Atmos content from sites like Prime Video when using a 4k Roku streaming device and a 1080p display:

 

Set your Roku streaming device to 4K/60 fps not 4k/60 fps HDR. The HDR signal raises the brightness and contrast level on any 1080p or older non HDR 4k TV beyond it's limits and will wash out the screen. This may be an issue with Peacock which only steams 4K content with Atmos on HDR formats. Prime video does not and I have found no difference in PQ when watching both 1080p and 4K streams. The splitter I posted is connected to my Pioneer AVR's HDMI output and my Panasonic Plasma TV's HDMI input. Both Disney Plus and Paramount plus, as I mentioned earlier, do not require a 4k display since they provide 4k streams with Dolby Atmos even if they are down scaled by your streaming device to 1080p. The idea here is to just down scale to 1080p using the splitter at the TV's input, rather then using the Roku streaming device which is monitored by the content provider sharing the same application. As far as other on line streaming services are concerned, such as the MAX and Netflix top tiers, which I do not subscribe to, from what I have read, as with Disney and Paramount, with the upgraded subscription they don't seem to have a problem streaming Atmos with 1080p.