Long-time Sonos owner, first post here because I'd love to see this happen.
My situation: My whole home runs on Home Assistant, including a custom local voice assistant that already controls my Sonos system (native integration + the new MCP).
The workaround: I built a custom Alexa Skill just so I can say "Alexa, ask Jarvis to..." — using Amazon as a laggy, cloud-based relay to reach an assistant running on my own network.
What I want is simple: Say my own wake word to my Sonos speaker and have the audio (or just the transcript) handed off to Home Assistant on my LAN, with the response played back on that same speaker.
Here's why it's feasible: The MCP is already half the job done. Sonos 27 lets third-party AIs reach into my Sonos system. This is just the reverse direction. The HA community would build everything else (wake words, pipelines) — we only need an opt-in hook for the mic stream.
I'd be happy to beta test anything in this direction.
Thanks for considering it.