I know they discontinued selling new versions of Chromecast Audio in 2019, but now I'm unavailable to cast to my Bose speakers or add them to a Speaker Group. Was there an official announcement?
👤 themerone Accepted Answer ✓
Google has been crippling products to avoid Sonos patents. I believe that speaker groups are one of the affected features.
If you can't get it working, you could try a regular Chromecast combined with an HDMI audio extractor.