The MIDI data transmitted via the MIDI interface is structured data for system control and audio data. The channel messages, Channel Messages, contain the musical details, and the system data, System Messages, are for the flow and structure of the audio.
The Channel Messages consist of the voice channel and the transmission channel for the different operating modes. There are many modes of operation and dynamic advancements. It is different with the System Messages. They contain cross-channel commands that are used for navigation in the case of real-time data and the use of sequencers. Certain System Messages are used to clear all settings made on the instruments.