Sonos as siren?

I want to use a sonos box as a siren, if the window will be open. The sensor for the door and the sonos binding are still working. But don’t know how to trigger the sonos box with an alarm siren?
Has anybody done this?

I guess you can use the Sonos as an audio sink (a feature of penhab 2).

And then create a rule to send a siren.mp3 to the Sonos.

Thanks, I was very helpful. I didn’t know this function.