Sonos volume changes on its own during playback

I don’t have my Sonos speakers connected to any TVs, nor play anything from my TVs through my Sonos speakers via WiFi or Bluetooth. I don’t have any Sonos soundbar speaker.

I only have HDMI cables connected from my Rokus to my TVs. But my TVs or Rokus are never playing at anytime the speakers decide to change the volume on me.

Would the speakers still change the volume from that scenario?

I’m not sure what the previous poster is driving at, but your best bet in this situation is to submit the diagnostic within 10 minutes of occurrence, then call Sonos at your leisure, referencing that diagnostic number. They should be able to look at the data in the diagnostic, and tell where the volume change was coming from. Normally speaking, there is no reason for you to be experiencing what you are, and I’m curious as to why you are, but neither if is have access to the data in the diagnostic. What I can tell you is I don’t experience this on any of my Sonos devices at all. Which doesn’t help you determine what the issue is. 

If it is software related, that will be a first report and confirmation of that. If it’s a hardware issue with perhaps a failing speaker, again, none of us would be able to identify that. If it’s the fact that the command came from some voice activated system that included that particular Sonos speaker as a room, without being a Sonos installation, most of us would require lots of back and forth to determine that, and have to poke into your network via these posts fairly deeply. And likely over several days of back and forths.  The easiest, quickest, and safest route is for you to capture the event in a diagnostic, I.e. within 10 minutes of its occurrence, and call Sonos Support to discuss it.

If you generate a diagnostics report within a few minutes of an occurrence, Sonos support may be able to identify what generated the “volume down” command from the diagnostic report. So, though you don’t like it, the advice is still: “what did Sonos support say?” - but be sure to generate the report before calling them 😜

I agree, scheduling a call with support to do troubleshooting while on the phone without a diagnostic report first while be nonproductive for both of us.

I get the point that a diagnostic report would need to be run first within 10 minutes of it happening.

I will try to do that if, and when, it happens again. As said, it doesn’t do it a lot or regularly, it happens occasionally. Also, it will do it with the speakers in my other rooms that I currently may not be in at the time it does it. So, even though it may have done it, I may not be aware it did it right within those 10 minutes.

So, be patient, who knows when I could be able to capture a diagnostic report and send it the next time it does it.

Till then....

If a tree falls in the woods and no one is there, does it make any noise?🙈

It doesn't matter which room you are in when you send the diagnostic report, just that it is sent before the log entry on the volume change is lost. The internal memory is small leading to the short submission window.

Once sent, the data is saved at Sonos so you can call when it is convenient. 

If you see multiple events before you have time to call, submit after every one, more data never hurts.

I wasn’t meaning that I am in the room when it changes. I was meaning the volume would change in another room and I may not know it did until I would have walked into that room maybe a half hour or more later.

Would the diagnostic report be of any help doing it that much later?

Depending on how busy Sonos is internally... Maybe.

It couldn't hurt.

Any data is likely better than no data. We in the public don’t know how the diagnostics work, so I’d agree with ​@Stanley_4 on this. 

Diagnostics are stored in a buffer. As the buffer fills, older entries scroll out. There is enough room in the buffer to store at least 10min of prime data. Some older data might be available, but not with the detail available in the 10min block.