 A single MIDI link through a MIDI cable can carry up to sixteen channels of information, each of which can be routed to a separate device or instrument.This could be sixteen different digital instruments, for example.MIDI carries event messages; data that specify the instructions for music, including a note's notation, pitch, velocity (which is heard typically as loudness or softness of volume); vibrato; panning to the right or left of stereo; and clock signals (which set tempo).