Can you describe what “cra” means, and what the forum moderators should be looking for in your diagnostic?

I would perhaps first try it plugged into a different power outlet. Sometimes ‘noise’ can come from an outlet, or extension lead/multi-plug etc.

Wait er…It’s coming through … I’m getting… ‘my Sonos One isn’t working with Alexa’ .. or something similar ha ha

Sorry, meant to say crackle/static sound on my sonos one. Thanks 

I’ve also seen rare cases of wifi interference being involved, most specifically from nearby, perhaps unshielded, power supplies adding to the issue.