Expressions I use in the Blog; Midi: What is MIDI ? MIDI is a set of instructions that allow a hardware or virtual instrument to reproduce a musical performance based upon the information being sent to it. Chords: A chord is a group of notes which sound at the same time. Chords are usually made up of three basic notes, (but any of the notes can be doubled up without changing the nature of the chord). Loops: A loop is a repeating section of audio that can be played over and