Alexa Default all audio through Sonos Speaker

I don't think that's currently possible, unless you actually connect your Alexa device to a Line-in using a headphone cable and a PLAY:5 or CONNECT.

No idea if its on the roadmap for older speakers, and they're unlikely to tell us. On the other hand, I'd bet that's the way it works on the new Sonos One, since there's no other way for it to work 🙂

I'd be surprised if Sonos hasn't asked Amazon for this functionality... but I'm sure it rests on Amazon to make it possible.

Just so I make sure I understand the question (cause I think I am in the same boat). Ex: When you ask your Echo Dot to play music, you have no issues, but if you ask Echo Dot for the weather, it plays through the Echo itself? I have found that out as well. I would like to as Echo "what's the temperature outside?" and have it answer over my SONOS Connect Amp, which I have connected to 6 in ceiling speakers around my house and back porch. Right now, if I ask it to play music over "living room" it will, but just don't know how to get every response to take the same route?

+1 for this to be added to Alexa/Sonos functionality

+1 from me,
Really want to set the default music streaming to Sonos and not the Amazon Dot, can't find anyway of communicating this desire to Amazon directly, so i'm hoping they take the idea of a true platform seriously and not restrict heavily to their own devices.

Correction...
I found a place to make a noise ;-)
https://forums.developer.amazon.com/content/idea/99589/set-default-music-output-to-non-amazon-speaker.html

I don't think this will ever be possible because of the way Alexa works with Sonos. Alexa never outputs any of its audio through Sonos, all it does is control the Sonos software using voice commands. When you give Alexa a command and tell her to play something on Sonos, it's simply executing commands on the Sonos software to stream music from it's own sources, never the audio that is coming from the Echo. The only way it might be made to work is to group the Echo devices, mute all of them except one dot and plug that dot into a Sonos bridge or speaker with an input socket. That way whenever you ask any Echo to play something it should output via the dot plugged into the bridge. Haven't tried it but logically it should be able to work.

+1 It’s annoying to specify the speaker when it’s in that room. Also, my wife and kids are lazy and don’t want to say, “on Living Room”or “on Dining Room”

Sonos has said they want to make this happen. Technically I couldn't speculate on the challenges but I'm sure they are working with Amazon on.

The Sonos One actually behaves the way we would like an Echo/Sonos speaker pairing to work. The Sonos One requires no room to be requested and the Sonos One only ducks the audio of the Sonos One when you speak a command.

I hope they get the pairing to happen. I like the Sonos One in my bathroom. However, I wouldn't want to replace other units with Sonos Ones as I prefer having DOTs in each room because I use them for intercom purposes (which the Sonos One will not do).

+1 agree this definitely needs to happen