Sonos Arc loud pop then audio loss

Best I can recommend, after disabling CEC on Xbox, is to power cycle (unplug/replug) everything including Arc and TV. 

That worked for me. But there are others with the pop who don’t even have an Xbox. So it definitely doesn’t solve the problem for everyone. 

Until Sonos makes an official statement, we just don’t know. We’re just users sharing information.

Very interesting thing just happened to me over the weekend.  I encountered a pop on the Xbox for the first time in a couple of months that seems limited to a single game only.  Both times that I played this game once returning to the Home Screen I got a pop, however it wasn’t the arc resetting type of pop, the system continued to function immediately after

Different type of exception perhaps?  Older games causing issues with CEC or perhaps forced Dolby Vision?

Game was “Contrast” for anybody brave enough to try to replicate

Sigh!

@ProfessorFrag were your Xbox series X set to 120hz when the pop sound happened ?

No, I have the Xbox running at 4K60 VRR. That being said, the Apple TV was making reproducible pops too on an HDMI 2.0 port. 

@ProfessorFrag i have no issue when my Xbox series X outputting 4k 60hz VRR with atmos sound . The only time happens is when outputting 4k120hz VRR with atmos sound . I have switched a couple HDMI cable but still the same . I also notice when playing in 4k120hz VRR Amy tv screen will occasionally has some white artifacts flashing on the screen but once I switched back to 4k60hz then everything is normal . My TV is Sony A90J Oled and yes it does support 4k120hz mode. PS5 runs absolutely fine tho in 120hz VRR

The first thing that immediately jumps out there is that the Xbox uses a completely different signaling technology for HDMI 2.1 bandwidth settings.  When you are using 4K/120 the Xbox signals using FRL (Fixed rate link).  When back on 4k60 VRR you are still within the HDMI 2.0 bandwidth standard so it uses the old technology of TMDS (I believe).  Could be something there about using hdmi 2.1 features 

Same issue, watching The last of us on Apple TV, then loud pop and nothing for a moment, then it will play fine for a bit then pop again, same situation, I shut off Dolby Atmos and still happening. Now watching Mandalorian on Disney + on Apple TV and same thing.

my diagnostic code is 1085889228

I haven’t experienced it since that one time months ago but it just happened twice within 5 minutes of the initial pop while playing the Resident Evil 4 Remake demo on Xbox Series X. I have had CEC disabled on the Xbox side for months which I thought fixed the issue but it didn’t. 
 

I am not disabling Atmos on a Soundbar I bought specifically because it has Atmos. This should have been fixed by now. 

Sorry to hear that. I’ve been pop free since Xbox CEC off. But of course there’s some background anxiety every time I watch Atmos now. 
 

I think that discomfort won’t really go away until we have an official statement from Sonos or a software fix. 

It’s a bit strange because I had only experienced it once before while playing Forza Horizon 5. Since that time I have played quite a bit of Halo Infinite, Forza Horizon 5 and other games without a single issue. I downloaded the Resident Evil 4 demo today and about 10 minutes into it the pop happened. I got my audio back and a few minutes later it happened again. I turned off the game and completed a race in Forza Horizon 5 without a single pop. I swapped over to Halo Infinite and played a match that lasted about 15 minutes without a single issue. 
 

While it has happened once in Forza the fact that it hasn’t happened since and I was in the clear until playing RE4 has me wondering if it’s, for the most part, game specific. I did see another poster here mention they experienced it during the Last of Us on HBO Max but with my Apple TV 4K it hasn’t happened once yet. 
 

I just don’t even know.