A TRIAD is a type of chord that consists of three tones. It is one of the most common chords used in music and is often used to create a sense of harmony. The three tones of a TRIAD are usually a root note, a third, and a fifth. The root note is the note that the chord is named after, while the third and fifth are intervals above the root note. Triads can be major, minor, augmented, or diminished, depending on the intervals between the notes.