The Architecture of Music

Chords

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The Underlying Architecture of Chords

maj3 chord interval diagram

As can be seen abov, the E maj3 is comprised of the E, G#, and B notes as the maj3’s 4 3 5 chord formula dictates as shown by the notes along the right side of the interval diagram. Even though more than three notes are often played in a chord, the same notes are often repeated. All intervals have names. As can be seen on the left side of the interval diagram below, an interval of four semitones is a maj3 (M3) and an interval of seven semitones is a perfect 5th (P5).

Chord formulas and interval diagrams are very important to understand. Everything in this book is based on them and they are used to describe all the information that is to follow. Since no record of the interval diagrams of chords could be found in common images in music today, the process of diagramming, organizing, and cataloging chords as formulas and interval diagrams began. Interval diagrams were used as the tool to check chords from source to source to confirm their names throughout the two decade long research of chords for this book as they never change and are unique to every chord. And as will soon be seen, you can do many things with interval diagrams that help to visually explain basic music theory that standard musical notation has difficulty expressing.