See this support link for the features supported by the Tidal Service on Sonos:

https://support.sonos.com/s/article/3096

@Andrewnoob,

It looks like you need the Apple TV/Fire-TV 4K etc. Tidal App in order to play the audio through your Atmos supported TV to the connected Arc/Beam (gen2) - there’s no direct support for Tidal Atmos audio through the Sonos App at the present time.
 

Only the Amazon Music HD service supports Atmos through the Sonos App at the present time, but hopefully more services, like Tidal, Apple Music and others, will support Atmos music through their built-in services, going forward.

Hmm. There's a Tidal app for my LG CX that advertised Atmos Audio until I signed in.

This is a bit of a shame, hopefully they add Tidal too.

I took out a trial subscription to Tidal a few months back to try Dolby Atmos and was88 definitely able to play it through my Arc. Can't remember immediately how though.

Edit: I think I must have used the Tidal app on my nVidea Shield.  That goes through an HDFury Arcana and onto the Arc, so I know it is capable of carrying Atmos.

@Andrewnoob - my best guess is that your TV app isn’t passing Atmos to the Arc.  

I assume you have a Tidal HiFi subscription? Edit- OK you have confirmed this.

I have a friend who has an LG C9 and is able to stream Dolby Atmos music from the C9’s native TIDAL app to his Arc. I would imagine the CX would have the same capability.
 

Be sure your TV is set to these settings:

Sound Out: HDMI ARC

HDMI Input Audio Format: Bitstream

Digital Sound Out: Pass Through

eARC: On

Auto Device Detection: On

Simplink (CEC): On

Auto Power Sync: Off

Hello everyone, I found this thread as was doing some testing myself on the various Dolby Atmos options through the streaming services and wanted to see how Dolby Atmos music sounded. 

My setup I have currently is Sony A80J TV, Sonos Arc + Sub and 2x One SLs, I normally just Air Play music using my iPhone as find the Sonos App not as good for browsing music etc, obviously personal choice. 
 

I started with just Apple Music, then today signed up for a trial for both Amazon Music and Tidal. 
 

I wanted to get Dolby Atmos music through my setup using AirPlay then quickly realised Apple Music does not support it from AirPlay as yet. 

I signed up for Tidal but then quickly realised you can’t do this also from the iOS app, I found a work around for this my tv has the tidal app which when playing music through says on the Sono App it’s Dolby Atmos and it has a section on the App for all Dolby Atmos content (pretty good to be fair). Sound quality wise sounds pretty good and seems like Atmos.

Amazon music, seems you can play through the streaming service Sono and says Dolby Atmos and the quality is fantastic. 

Maybe it is just me but Tidal and Amazon music sound totally different even through both say they are playing in Atmos on the Sonos app.

Does music sound different when going through an app through the TV vs streaming through the Sonos app using Amazon music. 
 

I can listen to the 2 same songs and there’s totally different effects coming through depending on which app / service you are using. Am I going crazy here? Lol

By the way sorry didn’t mean to hijack the thread but just wanted to give my own insight.

BTW for me the Amazon Music Dolby Atmos through the Sono app sounds pretty good so I’m thinking this is the way it’s meant to be heard?