Multicasting, multi-site connections are at the heart of the MARCEL network.  Several possibilities exist and the technical development of multi-point connections is increasing daily, all of them with limitations of one sort or the other.  Experimentation is on-going.

Some MARCEL members are experimenting with Jitsi, a platform which permits connections with several sites at the same time.
Also an interface with creative tools such as MaxMSP and PureData seems to be possible and members are exploring that possibility. 

MARCEL Room is in production over Jitsi and will be available soon be avaiable at