The Three Forms of Minor: Natural, Harmonic, and Melodic

The minor scale has an identity problem — a productive one. Unlike the major scale, which has a single fixed formula, the minor scale comes in three versions, each with a different relationship to the leading tone and a different set of characteristic harmonies. The natural minor scale uses the unaltered scale degrees of the key signature — all seven pitches exactly as they appear in the relative major. It is the simplest form, used extensively in rock and pop, and it produces a scale with a subtonic rather than a leading tone: the seventh degree sits a whole step below the tonic rather than a half step, and it does not create the same urgency to resolve upward.

The harmonic minor scale addresses this problem by raising the seventh degree one half step, creating a leading tone and restoring the powerful V-I cadential pull that defines tonal music. This is the form of the minor scale most associated with the classical tradition, and its raised seventh is what makes phrases like ‘the V chord in minor’ meaningful — without the raised seventh, the dominant chord is a minor chord, and minor dominants are considerably weaker than major ones. The harmonic minor creates a gap of an augmented second between the sixth and seventh scale degrees, an interval that sounds exotic and expressive and appears prominently in flamenco, klezmer, and various Middle Eastern musical traditions.

The melodic minor scale solves the harmonic minor’s awkward augmented second by raising both the sixth and seventh degrees on the way up — creating a smooth stepwise ascent to the tonic — and then reverting to the natural minor form on the way down, where the tendency toward the leading tone is less critical. This ascending-ascending, descending-natural pattern is unique among scales and reflects the melodic demands of the voice and instruments that need smooth melodic lines. The three forms of minor are not competing theories — they are three contextually appropriate solutions to the problem of building a minor scale that serves the melody, the harmony, and the cadence all at once.

Fundamentals of Music: A Modern Approach is the perfect introductory music workbook for high school and college students, delivering a fresh comprehensive approach to music fundamentals. The textbook features fourteen detailed chapters, innovative tools, activities, worksheets, an index and a glossary. By infusing musical content with his rich experience in the popular, jazz, and commercial music industry, Professor Richard N. Kahn effectively bridges the divide between classical music pedagogy and jazz and commercial techniques. In this way, Fundamentals of Music: A Modern Approach provides even-handed coverage of a wide variety of musical styles, from Medieval to Motown.

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