This is a quick review of the Chromecast Audio. Chromecast Audio works and looks much like the Chromecast for Video. However, it is used specifically for audio. It can be connected to any speaker using its 3.5mm audio port. The port supports analog and digital signals. Digital audio requires a Toslink-to-Mini-Toslink cable. It also supports Whole Home Audio, which works very well as a cheap alternative to Sonos. Once you have it plugged in all you do is open your favorite music app such as: Spotify, Pandora, Tidal, Amazon Prime Music, etc and tap the Cast button. To my surprise it actually plays the music in sync and works well as a cheap alternative to Sonos if you already have speakers around your house.