What is Diatonic Harmony?

Diatonic harmony refers to the system of building chords and harmonic progressions using only the notes that belong to a specific musical scale or key. In this approach, all chords are formed from the notes contained within the scale without introducing notes from outside the key.

In a major or minor scale, each scale degree can be used to build a chord by stacking notes from the scale. These chords naturally create a set of harmonies that fit together because they all share the same tonal center. This collection of chords forms the basic harmonic framework of many songs and compositions.

For example, in the key of C major, the scale consists of the notes C, D, E, F, G, A, and B. Diatonic harmony in this key would use chords such as C major, D minor, E minor, F major, G major, A minor, and B diminished, all built from the notes within that scale.

Diatonic harmony is widely used in many styles of music, including pop, rock, classical, and jazz. Understanding how these chords function together helps musicians create effective chord progressions and maintain a strong sense of key and tonal balance within a piece of music.