Ambient/Full Setting Applies to Atmos

As far as I’m aware Tidal does not support Atmos from within the Sonos app, so unsure how you are playing Atmos from that music service, which then makes me question if you really are streaming Atmos from Apple Music and Amazon.

Screenshots of the Now Playing screen on Sonos would be helpful to verify the Dolby Atmos badge is actually showing.

Did you ever contact Sonos Support after your previous thread?

edit: When you are testing this, are you also only playing to the Arc Ultra/Era 300 surrounds with no other room grouped? The screenshot will evidence this if you do attach.

Yeah I screwed that Tidal bit up so fair enough to question me now. Apple Music is the only one I actively use, but last year I got trials for Amazon and Tidal and remember using Amazon to test this specific issue. I assumed I would’ve done the same with tidal so I included that — I just didn’t want the conversation to become about whether it is my streaming service causing the issue, but obviously I should’ve been more careful so I’m sorry for that mistake! In general I’m sorry if my post came across as overly frustrated.

Here’s what I see on the Sonos app. No group, and the Atmos badge is there. 
 

I did reach out to support and got to level 2 support, but I found their final response to be unhelpful unfortunately. I’ll attach a screenshot of the end of that conversation.

This is from support. I was very confused by this response. It sounds like they’re saying it’s supposed to work the way I’m experiencing it? But when I’ve posted on Reddit asking others to test it, they said there’s no difference at all between the two modes in Atmos.

No worries. When you posted previously, I tested with Amazon Music and didn’t hear any difference with Atmos music when toggling between Full/Ambient.

If I were you, I’d record a video, or even a voice recording with the mic close to one of the Era 300 surrounds. Make 2 separate recordings. One with the setting as Full, the other Ambient. Both covering the same period of a track, then if you still say there is a difference, forward the recordings to Sonos Support. You will probably have to raise a new case in order to do so, as you can’t just email them without an open case.

One online voice recording website is https://vocaroo.com/

You could even post the links to the recordings here, to see if anyone can hear a difference between them.

You also have another possible remedies to your situation.

You could remove and re-add the surrounds to the Arc Ultra, or take the more drastic step of factory resetting the Arc Ultra and surrounds, but latter would involve setting up the Arc Ultra with your TV again, so more time-consuming exercise.

Thank you for the suggestions! Here are some links to a couple voice memos:

Ambient: https://voca.ro/1aTFtS7etSnG

Full: https://voca.ro/1iVF9TEpFk0e

This is what my Sonos app looks like:

To me, the Ambient setting is bassier, and then the Full setting both has more highs and also feels like the speakers all get slightly out of sync, so the kick drum in this example sounds like its flamming, while in the Ambient recording it sounds more singular and centered.

I unfortunately have tried resets a few times in different configurations (unpairing/repairing the Eras, resetting just the Arc Ultra, resetting all of the speakers, resetting the app itself, etc) but that’s always given the same result. Each time there’s new app and speaker updates I also try again but so far no changes.

Also to clarify, these voice recordings are new ones I just took, but I performed and sent a similar test when I was in the middle of my previous support case.