Google Chromecast Music and Multi-Room Audio Setup - YouTube
Chromecasts now support multi-room music playback - The Verge
Google's Chromecast adds high-res audio, multi-room play | HT Tech
How to create a multi-room audio setup with Chromecast Audio
Chromecast Video And Smart Displays Can Now Join Speaker Groups
Amazon.com: WiiM Pro AirPlay 2 Receiver, Chromecast Audio, WiFi Multiroom Streamer, Compatible with Alexa, Siri and Google Assistant, Stream Hi-Res Audio from Spotify, Amazon Music, Tidal and More : Electronics
A15 Wireless Speaker - Audio Pro
Google's Latest Chromecast Supports Multiroom Audio, 60fps Video - Variety