The first thing to understand about the formation of chords is that chords are made up of notes taken directly from the major scale. At the beginning of each group of chords throughout this book the major scale is shown with the note names and the degrees of the scale.
The thirteen notes of the scale given in the example are needed to form all types of chords. Study the following diagrams, the examples shown are the C major scale and the G major scale. Scales are explained in more detail earlier in this section.