Google Chromecast Audio, Wi-Fi-based music streaming dongle, discontinued | HT Tech
Google Home killed the Chromecast Audio – get one cheap while you can | Trusted Reviews
What Was Google Chromecast Audio and Why Was it Discontinued?
Chromecast Audio dongle has been discontinued. Found this to serve a Chromecast device with optical output. Just connect to a DAC then to an amp. You're good to go. : r/Chromecast