All Chromecasts can now be used for multi-room audio - FlatpanelsHD
WiiM's Mini and Pro are the Chromecast Audio's real replacement - The Verge
Google Home multi-room music setup explained: Nest, Chromecast built-in and more
Chromecast Audio review: The ultimate audio streaming dongle is better than ever - CNET
How to Chromecast to Multiple TVs Simultaneously - The Tech Edvocate
Google Chromecast Audio with Multi-room Support Review (Updated) - free time
Google Chromecast tips and tricks to make you a pro caster | Digital Trends
How to Setup Chromecast Mult-room & Group Speakers
Casting To Different Groups Through Google Chromecast | In this video we'll show you how you can use Google Home, Google Chromecast and MBX-Series devices in an ecosystem for group audio casting
Google Chromecast (2018) Review | PCMag
How to use Chromecast for playing music in every room of your house - CNET
How to use Chromecast Audio multi-room group playback? - All About Chromecast
AudioCast M5 is a ChromeCast Audio Alternative with Local Audio Files and Multi-Room Support - CNX Software