Chromecast multi-room audio support may be in the pipeline - 9to5Google
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AudioCast M5 is a ChromeCast Audio Alternative with Local Audio Files and Multi-Room Support - CNX Software
Multiroom ONKYO con Chromecast | Todos los equipos de audio con Chromecast Audio interno se pueden agrupar y utilizar en modo Multi-Room. Dentro de la industria de receptores AV, sólo... | By
Google's Third-Generation Chromecast Gets Multi-Room Audio Support
Chromecast Audio finally gains multi-room streaming
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Google's Chromecast Audio WiFi-enables your speakers, packs multi-room support
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Amazon.com: WiiM Pro AirPlay 2 Receiver with Voice Remote, Chromecast Audio, Multiroom Streamer, Stream Hi-Res Audio from Spotify, Amazon Music, Tidal and More : Electronics
Managing Chromecast Multiroom setup from HA? : r/homeassistant
Google Chromecast Audio with Multi-room Support Review (Updated) - free time
How to create a multi-room audio setup with Chromecast Audio
How to use Chromecast for playing music in every room of your house - CNET
Older Chromecast models will also get multi-room audio – Homecinema Magazine
How to Setup Chromecast Mult-room & Group Speakers
Using ChromeCast Audio Multiroom Wireless! - YouTube
How to use Chromecast Audio multi-room group playback? - All About Chromecast
