Media-accelerated Global Information Carrier (MaGIC) is an audio over Ethernet protocol developed by Gibson Guitar Corporation in partnership with 3COM.
The media payload is reserved for low-latency synchronous audio and video data, and control payload may encapsulate MaGIC control messages, MIDI data, and other protocols.
Control messages are generally broadcast to the entire network – each device processes the destination address and forwards to all neighbors if necessary.
The network elects a System Timing Master (STM) which is the source of synchronization on for all devices.
Devices may also establish control links using proprietary mechanisms as long as they are compliant with this specification.