If you rewind do you get the same noise at the same place?

Capture a diagnostic as soon as possible after the noise and contact Sonos support (not here) to have it looked at.

Unfortunately I don’t get the same noise when rewind. I called them after the 4th time hearing it, ran a diagnostic and couldn’t find any issues. 

I just had it happen to me as soon as I turned my tv on! No audio even playing thru the Arc Ultra. I turned everything off because it sounded like it was going to damage something. Same thing, I upgraded from arc. Connected to 2 subs. I thought I’d be happy, but it’s been one shortcoming after another with this setup. I’m getting really bad audio lag across multiple different streaming services and streaming “cable” too. And yes I tried lip sync and audio delay settings on my tv. Never had any issues with the arc. 

What did Sonos Support say, when you called them about these issues? 

​@Airgetlam they couldn’t find anything wrong with the system. Since I couldn’t duplicate the issue, they told me to keep monitoring and run diagnostics if I hear it again. Since that phone call, I’ve heard it three times. I ran two diagnostics yesterday and saved the codes, I’ll try to call them again later today. 

​@Sringer7 did you call Sonos?

Try changing your audio to automatic from compressed. I had the cracking noise when fast forwarding and playback mode on my Sony 77”. No problem since I made the change.

I have this same issue with my Arc Ultra. It happens very, very frequently. It’s like the sound hits some kind of technological wall and clips itself off. It’s terribly annoying. I will contact Sonos shortly.

​@Cnote I will give it a try

​@CovingtonMusic I’m hoping its software not hardware 

Same issue here. I heard this 3 times listening to music via Spotify and Youtube within 24 hours. I hope this is somewhat related to the issue that was fixed last year and can be easily fixed…

https://www.theverge.com/2023/11/16/23963790/sonos-arc-dolby-atmos-problems-loud-audio-pop-fix-rolling-out

Just had it happen twice in the last 24 hours with my brand new Arc Ultra. 

I am having the same issue. I am on my 2nd Arc Ultra in 2 weeks. I just have the soundbar and the Sub 4 hooked up to my Sony Bravia  55” TV.   The popping and crackling isn’t loud and there seems to be no pattern as to when it occurs, but it’s often enough to be very annoying. 
 

if anyone has any new suggestions I would love to hear them. The sound is incredible when it’s not popping and crackling, but I don’t know if I can get past this. Especially, given the fact that this sound bar was $1000. I may have to switch to Bose if I can’t find a solution for this issue.

I contacted Sonos earlier today and after troubleshooting, this was their response:

• Thanks for your patience while working through this. Regarding the problem you're experiencing, I want to assure you that you're not alone in facing this issue. It's a known issue within Sonos, and they're actively working on a solution. The step we tried today (the reboot) was the best course of action we currently have to address it, but at this time there's no specific timeline on when it will be resolved as it's still under investigation, but I appreciate your patience as they work through this. I understand that this may not be the outcome you were hoping for, and I truly wish I had better news to share. Now, I will escalate your case to our Level 2 support team. They may reach out to you if they need more information or to troubleshoot further, as this is an unusual issue that they are looking into. I am sincerely sorry for the inconvenience, especially since the Arc Ultra is a new product and should not be experiencing this kind of problem.

Chiming in: 

Rebooting does not fix the issue. 

​@Aeby Thomas I haven’t heard the noise since rebooting the system. I’m going to keep monitoring. Did you reboot all equipment linked to the Arc Ultra as well (20 sec min)?

Experienced this yesterday, pulled HDMI out to Arc Ultra and plugged it back in without turning anything off, perfect sound right away.
Hope this isn't something that comes back sporadically.

Yes ​@FCP 

rebooted the chain, TV, aTV, Arc U. The chain is wired on LAN. 
The phenomenon manifested randomly just this evening! Since 1 week past installation.
Turning off Trueplay, reduces mean time between instances. Which otherwise is every 5 mins. 
Let me pull out the cable as Peter254
 

I don't know if it matters, but it was in the TV's eARC port that I removed the HDMI cable and put it back in 3 seconds later.

Update: Tried everything incl. changing stream to auto from uncompressed. Unplugged everything overnight. Issue solved upon playback today. 
Can’t put a finger to what fixed it. Fingers crossed. 

Update: rebooted the system on Friday, noise returned last night. I tried what ​@Peter_254 did, monitoring now.