Chromecasts now support multi-room music playback

Chromecasts can now be used to play music in sync across multiple rooms and devices. Engadget reports that an update rolling out today allows Chromecasts to be added to speaker groups, a handy feature for those who want to combine multiple Google Cast-compatible devices for simultaneous audio streaming. Previously, speaker groups could only be made with audio devices, meaning the standard Chromecast was excluded.
Google announced that support for speaker groups was coming to the Chromecast back