AudioBridge runs in the background on your computer and creates an AirPlay device for each Sonos speaker group on the same network. Choose which speakers to AirPlay-enable, give them a custom name, and start listening to any audio you want. Apple Music, YouTube, SoundCloud, podcasts, music blogs, you name it.
Was my fave app for a year and turned all sorts of people into fans. But it STOPPED working and I’ve been advised ALL support is discontinued. Low blow.