Echo Dot on Sonos Connect Line-in

Do you have the Sonos skill enabled? If so, I recommend you disable it, since it's not the configuration you want to use. By connecting the dot directly to the line-in, you're effectively saying you want your connect to just be a pass through for Alexa audio, you don't want Alexa controlling Sonos.

Also, since you're using a CONNECT, you must have a an amp/receiver that the connect is feeding. I assume you verified that the amp/receiver is set to the proper input to hear the CONNECT? If you don't set that in advance, you're essentially need both your CONNECT and amp/receiver to auto sense that dot is speaking and then turn on the input so to speak.

It's a matter of opinion for sure, but I'm not at all a fan of this sort of setup. The idea of using sonos and voice control is convenience and ease of control. This seems like a setup with too many moving parts and manual steps to work well...but that's just me.

If you want to use the Echo Dot hooked by wire to the Sonos unit then DON'T ACTIVATE the Echo Sonos skill. When you activate the Sonos skill in Alexa it will lower the volume of all the Sonos speakers in your house when you ask Alexa a command. When you have an Echo Dot physically wired to a Sonos Play:5 it is acting as the Dot's speaker. So when the Dot then tries to reply something via the Play:5 the Echo Sonos skill is lowering the Play:5 volume (something you do not want).

so deactivate the Sonos skill to use wired.

Or if you want to remove the wire then activate the Sonos skill and remove the wire (and all normal Alexa replies will then come form the Dots speaker and Sonos spekaer will only be music)

I have this issue as well, and it’s still not fixed
I have tried using the dot without the line in and it works and plays the sonos (using the skill) but I do t like the fact the dot commands all come out of the dot. It sounds awful.
I have one dot in the kitchen wired up to a connect amp, a sonos one in the lounge and an echo plus in my daughters room, I sometimes want to command though any of these to play sonos in different or multiple rooms, so if I disconnect the Sonos skill this won’t work any longer will it?
Sonos surely you must be able to fix this! It worked perfectly up to your last software update so surely you can work back on this as an issue?

If you have thrbdot connected to thenconnect amp. If you leave Sonos skill on. Consider thensotnjsut like a Sonos One. If you don’t say a room name it will play on itself to the connect amp. If you give a room name after command the Sonos skill will send the music to the alternate room.