Hi - I've been using AirSonos at the beginning and then I created a similar application, works as a generic solution for UPnP https://github.com/philippe44/AirConnect (there is a version for Chromecast as well).

NB: I have no intention to be disrepectful of the work made by stephen and/or "troll" his github. I'll remove this comment immediately is considered as such. I'm posting here because I've seen the application has not been updated for a long while, and I want to help others. My app is free as well

Thank you Philippe44,

Will try later, with your app i can send the audio to the sonos system too?
Once more thank you

Yes it does work - Sonos speakers are fully UPnP compliant

Yes tested working 110% THANK YOU