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Section 7.3 Diatonic Chords in Minor

Because there are three versions of the minor scale, there are more than seven diatonic chords in minor. The sixth and seventh scale degrees affect all of the triads except the tonic, making 13 possible diatonic triads in minor.

All diatonic triads in A natural minor, A harmonic minor, and A melodic minor

However, when one analyzes a large amount of tonal music, one finds the following Roman numerals are most commonly used in minor.

The most commonly used diatonic triads in A minor: A minor, B diminished, C major, D minor, E major, F major, and G-sharp diminished, with Roman numerals

Notice that both \(\left.\text{VII}\right.\) (the “subtonic triad”) and \(\left.\text{vii}^{\circ}{}\right.\) (the “leading–tone triad”) are included. The subtonic triad (\(\left.\text{VII}\right.\)), built on the lowered \(\hat{7}\) that occurs in natural minor, regularly occurs in circle of fifth progressions in minor and in rock and pop music, while the leading–tone triad (\(\left.\text{vii}^{\circ}{}\right.\)), built on raised \(\hat{7}\) , is usually either a passing harmony or has dominant function.