Minor scales — Music Theory

If the major scale sounds bright, the minor scale sounds darker — sadder, sometimes nostalgic, sometimes ominous, depending on context. Almost all rebetiko and laïkó songs are in minor keys, so understanding minor scales is non-negotiable for bouzouki.

But there’s a twist. There isn’t one minor scale. There are three, and they exist for specific musical reasons.

Natural minor

The most basic form. Its formula has the half steps in different places from major:

Natural minor formula

W – H – W – W – H – W – W

Apply it starting on A La :

A – B – C – D – E – F – G – A

A natural minor

Look at the notes. A La natural minor uses exactly the same notes as C Do major. Only the starting note is different.

Harmonic minor

Natural minor has a problem. Look at the seventh note — G Sol in A La minor. It’s a whole step below the tonic, not a half step. That means there’s no strong “leading tone” pulling back home. The cadence at the end of a phrase feels weak.

Harmonic minor fixes this by raising the seventh by a half step:

Harmonic minor formula

W – H – W – W – H – W♯ – H

The W♯ at position 6–7 is shorthand for an augmented second — three half steps in a row. It’s an unusual interval that gives harmonic minor its distinctive “Eastern” or “exotic” sound.

For A La harmonic minor:

A – B – C – D – E – F – G♯ – A

A harmonic minor

The raised G# Sol# creates a strong half-step pull from seventh to tonic — exactly the leading-tone function that natural minor lacked.

Melodic minor

Harmonic minor solves the leading-tone problem but creates a new one. That augmented second is awkward to sing. Composers writing melodies (as opposed to chord progressions) wanted a smoother way up the scale.

Melodic minor’s solution: raise both the sixth and seventh going up, so the awkward gap disappears.

Melodic minor formula (ascending)

W – H – W – W – W – W – H

For A La melodic minor going up:

A – B – C – D – E – F♯ – G♯ – A

A melodic minor (ascending)

When melodic minor descends, classical convention is to revert to the natural minor form — no raised sixth, no raised seventh. So melodic minor historically had two different shapes depending on direction. Jazz musicians later dropped this rule and use the ascending form in both directions.

For our purposes — bouzouki and Greek music — melodic minor matters less than natural and harmonic. We mention it for completeness.

How to think about all three

Don’t memorize three separate scales. Memorize this:

Natural minor is the default.
Harmonic minor raises the 7th to fix the leading tone.
Melodic minor also raises the 6th to smooth out the singing line.

They are the same scale with two specific adjustments for two specific musical problems.

Recap

Three forms of minor exist: natural, harmonic, melodic.
Natural minor: the basic form, same notes as the relative major, starting on a different degree.
Harmonic minor: raises the 7th to create a strong leading tone home.
Melodic minor: raises both 6th and 7th going up, for smoother melody; traditionally reverts to natural minor going down.
The raised 7th of harmonic minor is the characteristic sound of much Greek and Middle Eastern music.