Spotify now comes with Chromecast and Chromecast Audio support - HardwareZone.com.sg
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WiiM Pro Plus AirPlay 2 Receiver, Chromecast Audio, Multiroom Streamer with Premium AKM DAC, Voice Remote, Works with Alexa/Siri/Google, Stream Hi-Res Audio from Spotify, Amazon Music, Tidal and More - Yahoo Shopping
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Vote for higher Chromecast audio quality options : r/spotify
WiiM Pro AirPlay 2 Receiver, Chromecast Audio, WiFi Multiroom Streamer, Compatible with Alexa, Siri and Google Assistant, Stream Hi-Res Audio from Spotify, Music, Tidal and More - Newegg.com
Chromecast Audio streams Spotify or Google Play Music to almost anything | Stuff