At home I have been using a Yamaha AV RX-A380, it’s an home teather audio video solution where you can plug about everything you need (like 7 hdmi channel, spoiler alert there is something wrong with you if you have that many devices) and output to two other hdmi channel (like a tv and a projector).
It has integration for spotify, airplay, netradio and billions of connection to everything, just look at the damn back of this device :
Here it is at your convenience to using or hack it :
This doesn’t support multi-zone and assume the web interface is resolvable to http://yamaha.local/ (it should be by default) so be aware. This may support other Yamaha AV devices but since I don’t have it I can’t say and you may have try, if it does kindly add a comment here soother would know 🙂