School me on SONOS and other home streaming systems

I primarily use the Sonos app to connect my turntable to my Sonos speakers, which is run through a Connect. The app redesign unfortunately makes this completely unintuitive and pushes streaming apps to the forefront.

Yeah they dropped the Autoplay option from the Connect input settings in the new app. Supposedly it’s on the list of things that will be coming back in an update and that should make it much easier.

The new app must be a crazy fucking refactor if they can't reuse an autoplay function

but detecting nonzero voltage on a line-in and switching that speaker on doesn't seem to involve "new APIs"