What Is the Melodic Minor Scale?
A natural minor with raised 6th and 7th degrees
From a technical point of view, the melodic minor scale is a seven-note minor scale built from the natural minor scale by raising both the sixth and seventh notes by a semitone. The result is a scale that retains the minor third (the defining feature of any minor scale) but otherwise resembles a major scale: a major sixth, a major seventh, and the same overall flavour of brightness in the upper half. In A: A natural minor is A, B, C, D, E, F, G; A melodic minor (ascending) is A, B, C, D, E, F♯, G♯.
A natural minor: A B C D E F G A
A melodic minor: A B C D E F♯ G♯ A
Like all scales, a minor scale is a collection of notes brought together to make a specific sound. Think of the collection of notes as a palette of colours. In this analogy the performer is the painter, and the melody they play is the painting.
The palette of colours in the melodic minor scale produces a spectrum of dark and bright tensions. Unlike its other minor counterparts which have fixed pitch sets, the melodic minor has both ascending and descending forms. This gives a huge range of opportunities to conjure different musical moods - lyrical, melancholy, mysterious, tense and dynamic. Famous melodies like Ain't No Sunshine, Samuel Barber's Adagio for Strings, Autumn Leaves and even Alone Together are all composed from the palette of colours available in the melodic minor.
The melodic minor scale is one of three minor scales, alongside the natural minor and the harmonic minor. It exists for two specific musical reasons. First, it provides a leading tone (the raised seventh, sometimes called the raised 7th) for strong minor-key cadences — the same reason the harmonic minor exists. Second, it does this without producing the awkward three-semitone augmented second between the sixth and seventh degrees that the harmonic minor creates. Raising the sixth as well as the seventh smooths out the upper half of the scale into a stepwise pattern that is easy to sing and easy to write melodies in.
That second property is what gives the melodic minor its name — "melodic" because the scale is shaped for melodic writing, prioritising smooth voice leading over harmonic strength. This versatility in the melodic minor is what gives the scale such a broad range of colours.
In short, the harmonic minor exists for harmonic reasons (a strong V chord); the melodic minor exists for melodic reasons (singable lines). They solve the same underlying problem — how to give a minor key a leading tone — in different ways.





