There's a solution to streaming music and podcasts to all your speakers and stereos around the house and it's the HiFi WiiM.
WiiM's Mini Streamer is a Google Chromecast Audio Sound Improver
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WiiM's Mini and Pro are the Chromecast Audio's real replacement - The Verge
Audiophile music streamer for $40??!! Better than Google Chromecast Audio?
Finally, a HiFi alternative to Chromecast Audio: WiiM - RouteNote Blog
Best value streamer with no DAC, Page 21
HiFi Archives - RouteNote Blog
Best value streamer with no DAC, Page 21
Finally, a HiFi alternative to Chromecast Audio: WiiM - RouteNote Blog
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WiiM's Mini and Pro are the Chromecast Audio's real replacement - The Verge
Streaming music player and digital preamp with Wi-Fi®, Chromecast built-in, Apple AirPlay® 2, and Bluetooth®
WiiM Pro Plus