Minor Scales

Ask a guitarist what a minor scale is and you get one answer. Ask a classical pianist and you get three. Both are right: “minor” is a family of related seven-note scales, not a single fixed pattern. The three members share the same first five notes, then diverge at the 6th and 7th degrees. Those two notes are the entire story of why minor scales come in three forms.

The three are natural minor, harmonic minor and melodic minor. Each solves a problem the previous one could not: natural minor for its modal sound, harmonic minor for the dominant chord’s pull, melodic minor for smooth singable lines. A single piece in a minor key often draws on all three depending on the moment.

The widget below lets you pick any minor type, choose a root and hear the scale played up and down. Listen for the change in the upper half, which is where the minor scales identify themselves.

Widget 01 · Three Minor Scales Compared

scale tonesounding now

The natural minor scale follows the formula W H W W H W W. From any root: whole step, half step, whole, whole, half, whole, whole. The result sounds darker and more reflective than major, and the difference comes from the lowered 3rd, 6th and 7th degrees.

Scale degrees

Each degree has a name and a function. In A natural minor: A (tonic, 1), B (supertonic, 2), C (mediant, ♭3), D (subdominant, 4), E (dominant, 5), F (submediant, ♭6), G (subtonic, ♭7), A (octave). The defining note is the subtonic 7th. It sits a whole step below the root rather than a half step, so it does not pull back toward the tonic the way a major scale’s leading tone does.

The relative-minor relationship

Every major scale has a natural minor that uses exactly the same notes, its relative minor. C major and A minor are relatives: both use C, D, E, F, G, A, B. The only thing that differs is which note feels like home. Start a melody on C and resolve there and you are in C major; start and resolve on A and you are in A minor. Same seven notes, opposite gravity.

The shortcut: count down a minor 3rd (three half steps) from any major tonic. C minus 3 semitones is A, G minus 3 is E, F minus 3 is D. That is the relative minor every time.

Where you hear it

Natural minor is the default when popular music wants something dark: much of rock and metal, and a great deal of film scoring. Its modal openness, the absence of a strong leading tone, gives it a contemplative quality that a classical V to i cadence would interrupt.

The harmonic minor scale takes natural minor and raises the 7th degree by a half step. The formula becomes W H W W H Aug2 H. In A harmonic minor: A, B, C, D, E, F, G♯, A. One note changed, everything else the same, and the harmonic possibilities of the key are transformed.

Why classical composers needed it

In a major key the V chord is itself major, and its third is the leading tone, a half step below the tonic, pulling strongly upward. V to I cadences in major work because of that pull. In natural minor the diatonic V chord is minor (E minor inside A minor) and its third is the subtonic G, a whole step below the tonic. That cadence feels weak: there is no leading-tone pull.

Raising the 7th solves it. The V chord becomes major (E major, spelled E G♯ B, inside A minor) and G♯ is a true leading tone, so V to i regains the authority it has in major keys. That is the “harmonic” in harmonic minor: the scale exists primarily to support functional harmony.

The augmented 2nd

The price of raising the 7th is the gap it opens below it. In A harmonic minor, F to G♯ is three half steps, an augmented 2nd. It sounds like a minor 3rd but is spelled as a 2nd because it spans only one letter step, F to G.

Singers and players have historically found the leap awkward, and it is also the source of the scale’s character: it is the sound many listeners associate with Romani, Klezmer, Middle Eastern and Spanish music. Composers from Bach to Bartok used it for color, not only for cadences.

The melodic minor scale answers the augmented 2nd by also raising the 6th, but only when ascending. Its ascending formula is W H W W W W H. In A melodic minor ascending: A, B, C, D, E, F♯, G♯, A. Two raised notes, no awkward leap, a smooth path to the tonic.

Classical melodic minor

In the classical tradition melodic minor is asymmetric. Going up, you raise the 6th and 7th because the line wants to resolve upward to the tonic, so you smooth the path. Going down, the leading-tone pull is no longer needed, so you revert to natural minor: A, G, F, E, D, C, B, A. Two different scales for two different directions.

It sounds strange described in the abstract and obvious when heard. Play A natural minor up and down. Then play A harmonic minor up and down, and the F to G♯ leap stands out. Then play the classical melodic form: ascending raises both notes, descending releases both, and the melody flows in both directions.

Jazz melodic minor

Jazz musicians treat melodic minor as a single seven-note scale, the ascending form in both directions. It is the parent of the altered scale (its 7th mode) and of Lydian dominant (its 4th mode), among other colors. For a jazz player, melodic minor sits alongside major, harmonic minor and the diminished scales as core material.

If you are studying classical, learn the asymmetric form. If you are studying jazz, learn the ascending-only form. If you are doing both, learn both: they are the same notes going up, and only the descent differs.

Stack the three minor scales on the same root and the differences become visible. Degrees 1 through 5 are identical. The 6th is lowered in natural and harmonic minor and raised in melodic minor ascending. The 7th is raised in harmonic and melodic minor and lowered in natural minor.

Watch the keyboards below: only the upper half changes. That is where the minor scales argue with each other.

Widget 02 · Side by Side, A as Root

Compare the three minor scales sharing the same root. The 6th and 7th degrees are the only notes that change.

Minor key signatures match their relative major exactly. C major and A minor share zero accidentals. G major and E minor share one sharp (F♯). B♭ major and G minor share two flats (B♭ and E♭). The signature on the staff does not tell you whether a piece is major or minor: for that you read the tonal center, the opening chord and the cadences.

Natural minor uses the key signature directly, with no alterations. Harmonic and melodic minor use the same signature plus accidentals: the raised 7th, and the raised 6th in melodic minor, appear as written-in sharps or naturals in the score rather than in the signature.

Below are all fifteen standard minor key signatures with their accidental counts and the notes they alter. Fifteen minor signatures pair one to one with the fifteen standard major ones, which is why A♯ minor belongs in the table: it is the relative minor of C♯ major, the seven-sharp key.

Widget 03 · Natural Minor in Every Key

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A natural minor: A B C D E F G

Build the three from one root

The fastest way to internalize the differences is to play all three from the same root in one session. Start with A, which has no accidentals: play A natural minor up and down. Raise the G to G♯ and you have A harmonic minor; listen to the augmented 2nd between F and G♯. Then raise the F to F♯ ascending for A melodic minor, and on the way down drop the G♯ back to G and the F♯ back to F.

Hands separately, then together

Right hand alone until it is automatic, left hand alone until it is automatic, and only then combine. Fingerings in minor scales differ from their major counterparts because of the altered notes, so the crossings fall in different places. Putting both hands together before each is solid is the most common reason students stall here. The full routine lives on the scale practice page.

Slow with a metronome

Set the metronome to 60 BPM, one note per click. If you cannot play it cleanly slow, you cannot play it cleanly fast. The augmented 2nd in harmonic minor needs the slow work in particular, because the hand wants to compress that larger gap into an ordinary whole step.

Connect to repertoire

After practicing a minor scale, play a piece in that key. Bach’s C minor invention, Chopin’s nocturnes and Beethoven’s Moonlight Sonata in C♯ minor all draw freely on natural, harmonic and melodic minor depending on the moment. Hearing where each version turns up in real music is what makes the theory stick.