Lost surround and sub ( after update ?)

I am also getting a full drop out for a second.  Happens about once a day for me.  Don’t know if it’s related to this or not but it started a few weeks after the other issues started.

If you can easily reproduce the issue even after power-cycling all your A/V products, then submit a diagnostic report within 10 minutes of seeing the issue, note it’s reference number, and then contact/chat to Sonos Support Staff via this LINK.

Hello,

How many people on here experiencing the issue have 20Mhz/40Mhz Co-Existance enabled on their 2.4Ghz Wi-Fi frequency? Or, are using 20Mhz or 40Mhz as their 2.4Ghz band for Wi-Fi?

Thanks,

Brad

The reason I mention the above is that I had a theory to explore when thinking about some of the symptoms.  i.e:

1. Loss of sounds when flicking between channels.
2. Loss of sound during the watching of a movie and/or music. 
3. Weird sounding bass which is flabby, out of sync or does not sound right.

My system is basically back to the configuration it was before I messed around with it during testing - and also 14.8 is now installed. And it has been much more stable than before - this morning, once again, I was going through my ‘trigger script’ and it did not trigger the issue. 

The only difference I made to my network a while back was that I disabled 20/40 MHz coexistence on my Wi-Fi to stop the behaviour noted as below:

When 20/40 MHz coexistence is enabled, your router’s 2.4 GHz radio uses 40 MHz bandwidth until it detects another broadcast device using 40 MHz, at which point it falls back to 20 Mhz to avoid interference.

I was also reading this during my research:

Using a 40 MHz channel in 2.4 GHz doesn't work well, because there just isn't enough room for it. It has a higher chance of causing and receiving adjacent and co-channel interference.

My theory was (for whether reason it was introduced) is that this management of connecting devices and moving them between bands could have some negative effects. (The last point in bold in regards to interference also caught my eye and made me feel it was something to explore).

I am not sure if this really is the root cause, but I just wanted to point out a key change I made to my network and have been more stable since. There is a penalty, which is basically speed and there is some talk about Bluetooth but none of this has been a problem with me streaming music or normal operation of my printers, speaker or smart devices. 

What I would really like is for someone else who is having the problem (especially someone that is experiencing the problem very frequently) and see if they either fix their frequency to 20Mhz or disable 20/40 MHz coexistence. PLEASE NOTE: You really need some time as a full reboot of the router and restart of all Sonos devices in the right order needs to be performed). 

I’ve been on 20mhz the entire time, during period when all the dropouts were occurring and now when system has magically stabilized on its own, no wireless settings changes

That was a very short lived theory I had then!

It might be worth someone trying this though. Just to rule it out completely.

I was on 20/40 MHz the entire time when I had the issue. Now I’m still on 20/40 but have no issues.

I really have no idea what is going on! How does an issue just disappear. 

You think 14.8 did some good when they released it?

I don’t think so. I still had the issue after 14.8

The only thing that I can think of is the voice assistant.

That makes it even more odd - the fact that you still had it after 14.8 but adding VA solves it. 

My brain hurts. I need a vacation.