In message , pamela
writes

We have had fun with a Chromecast Audio [1], and the above would be at
least partially solved if one could cast to more than one device
simultaneously. Anyone know whether that is possible?

There are mumblings uttered in some discussion groups that multi-casting
will be included in a firmware upgrade to Chromecast Audio.

Excellent. I browsed the VLC site and noted they are looking into
casting direct from the media player, which will be useful.
--
Graeme