Upfiring speakers after adding surrounds

When you play the test tones file, does the Sonos app say you are getting Dolby Atmos audio?

When you play the test tones file, does the Sonos app say you are getting Dolby Atmos audio?

Yes, I can see one the apps screen that shows TV Dolby Atmos and (DD+) Dolby Atmos on About My System in the apps.

Some people from reddit also reported the same issues before.

https://www.reddit.com/r/sonos/comments/hc21uu/dolby_atmos_512_test_video_file_download_link/

Do you hear audio coming from the upward firing speakers when streaming Dolby Atmos content? How far are you seated from the Arc? How high are your ceilings? Are they flat? How far is the Arc from your ceiling?

Do you hear audio coming from the upward firing speakers when streaming Dolby Atmos content? No while playing the test file.

How far are you seated from the Arc? around 12 feet

How high are your ceilings? 10 feet

Are they flat? Yes

How far is the Arc from your ceiling? 8 feet

Do you hear audio coming from the upward firing speakers when streaming Atmos content from Netflix and Disney+? If so, I would ignore the test tones file.

12 feet is too far to hear the height channels. Find a scene in a movie with clear height effects and move within 5-7 feet of the Arc and adjust the height audio level from 0 to +10 and see if you can hear a difference.

I suspect what you mention above, is something to do with this… and that the TV, which itself doesn’t handle height Audio channels is perhaps (causing) down-mixing of the height channels to the surrounds as it passes from the Shield and through the TV ports. One way around this is to bypass the TV altogether by using an HDFury Arcana audio extractor/splitter as widely mentioned in other threads on the forum. See this link:

https://www.hdfury.uk/product/hdfury-arcana/

I set height adjust to 10+ and I tested the upward speakers Avenger Endgame where Captain America casts lighting down on Thano (2:13:35), I can't hear upward speakers from the ARC and I can tell it was transferred to the SLs. Interestingly, when I turned off surrounds on the apps, I can hear upward speakers from the ARC on the same video. 

So it is something to do with the surrounds I guess, unless I am not really getting the "Ture” DD+ Dolby Atmos from my Shield TV through my Samsun TV 2017 model. 

I will also try to move my couch closer to the TV and redo the Trueplay calibration.

Yes I was suspecting the same thing and I was thinking about ordering one. 

Very strange. If the Sonos app is showing “Dolby Atmos (DD+)” then the Arc is receiving Atmos audio and it should be able to send each audio channel to the proper speaker/driver.

I would try removing the surrounds from the Arc in the Sonos app and unplugging the One SLs from power for a couple of minutes and re-adding them as surrounds. Then test again.

Another good height channel scene to test is from The Wandering Earth on Netflix. At about the 1:23:25 mark, there are clear electric spark sound effects playing out of the upward firing speakers for the next 30-40 seconds. Just be sure you are listening to the Dolby Atmos Chinese track.

I have re-added the SLs in the apps and still the same while testing Avenger Endgame. 

However, when I tested The Wandering Earth scene, I can clearly hear the electric spark sound effected above my head. I am so confused now LOL