Chromecast Audio Software Matrix Switch? I would like to do a whole house audio setup using the chromecast audio pucks so that I don't have to run a lot of speaker wire through out the house to a central location.  I was wondering if there is a software package out there for Home Assistant or OpenHAB that can act like a matrix switch allowing me to specify what source/s is providing audio signals to the chromecasts scattered throughout the house?

I would like to use their web interface to do this.