Lost surround and sub ( after update ?)

Quick reminder to everyone: disabling your sub in the Sonos app with the bug active will restore bass to your Arc only. Enabling it again will kill the bass entirely. This means that when this bug is active, something is blocking the bass signal from reaching the subwoofer. 
 

Recent diagnostics:

114012412
457472945
309070588
484143636

FWIW I haven’t had the issue at all since turning off eArc and setting my Apple TV to Dolby digital 5.1 via change format. I don’t use any other sources though there is no input switching for me. 
 

this workaround works for me in the meantime 

I suspect when there is some sort of codec change to the audio that triggers the issue. I can always trigger it through the native Youtube app on my Sony Android TV while browsing through several videos all encoded differently.

Same here, it seems to happen a lot when I’m going in the YouTube app on my Apple TV.  

I also have this problem. 

I have Arc, sonos:one and Sub gen3

• Surround and sub stops working when switching source occasionally.
• Sometimes speakers cuts out briefly, and then comes back but are about a second delayed.
• Problem can occur when switching from TV to Sonos Radio or Spotify through the app. If it does I can remove the HDMI cable while streaming directly to the Arc and the problem will persist.
• I have tried all delay options in the app, without any noticeable change. 

Only restarting the Arc seem to solve the problem temporarily.

I think I’m probably “in” on this issue as well. I have a completely wired surround setup (Arc, Sub, two Ones; all of them are on ethernet, on their own VLAN, and have wireless completely disabled).

With 14.6 I get random slosh of audio sync; any music in a soundtrack (which tends to be in the front and rears) eventually starts to get the signature “phasy” sound of sync loss. Eventually lip-sync in the centre channel is lost.

The only solution is a full reboot of the entire speaker setup.

I’ve temporarily seemed to have solved this issue by disconnecting all my ethernet cables and just going to a wireless setup with only the Arc connected to ethernet. This is, of course, not ideal. 

Devices I’ve seen this issue occur with: Apple TV 4k. Sony A80J TV (playing from internal apps). Panasonic BD player (outputting Atomos or LPCM). PlayStation 5 (which is outputting LPCM).

I’m a little bit worried about the ‘Actually...’ post from Cory though; this is very obviously an issue that has appeared with 14.6 given the number of people seeing this problem.

Regardless of the issues mentioned in this thread, wiring all of your devices in a Sonos home theater setup and disabling WiFi on all devices is generally not recommended. The Sub and surround speakers are designed to communicate to the Arc wirelessly via the 5GHz wireless connection the Arc creates. What you are doing now (only the Arc wired and WiFi enabled on ALL devices) is the recommended “wired” setup.

Unfortunately, being on SonosNet doesn’t resolve the issue. I’ve been using Arc wired with my subs wireless and this bug still occurs. I haven’t found any solution to this bug so far aside from disabling all wireless satellites and using the Arc by itself.

Maybe, so.

Everything worked fine until 14.6 though.

Also, not recommend by who, exactly? Sonos seems to be pretty actively willing to support wired setups as long as your STP settings are correct (they even explain Sonos’ archaic STP setup so end users can make this work properly).

Unless the surrounds are passives driven by Connect:Amp, in which case wiring is the only option. 

Frankly, most home wired networks ought to have a sub-millisecond latency.