Play to multiple devices from windows

[melks]

Plan

Premium

Country

UK

Device

PC

Operating System

W10

My Question or Issue

I have a windows 10 PC with good speakers and a sonos system throughout the house. Is there a way to play from my PC and Sonos speakers at the same time when using the Spotify desktop app? Why can't I select more than one device or mix them like the sonos app? They are all in the same house and on the same account so I don't see why I cant?? Sorry if this has been asked, but seems like something we should be able to do as its a single account with multi speaker setup in the same location.

Thnaks. S