Audio broadcasting

The Music department is very keen to start broadcasting music at break times and lunchtimes that are live or have been pre-recorded. At the moment, there is no intercom system connected throughout the school but there might be the possibility of broadcasting through iTunes or VLC player as explained in this online tutorial:

http://www.wikihow.com/Use-Vlc-to-Stream-Audio-and-Video-to-Multiple-Computers-on-Your-Network-Using-Multicast

If anyone has any other ideas, please let us know.