What is the harmonic minor scale?
The harmonic minor scale is the natural minor scale with one note changed: the seventh is raised a , so the scale runs 1, 2, ♭3, 4, 5, ♭6, 7. The raised seventh sits one key below the and leans into it, and the gap it leaves between ♭6 and 7 — three half steps written as a single step — is the . Two of klezmer (כּלי־זמר) 's , (פֿרייגיש) and Ukrainian Dorian, use exactly these notes from a different home.
Western classical harmony raised the minor scale's seventh so that the chord on the fifth would be major and pull toward the root — the 'harmonic' in the name is that chord. Melodies avoided the resulting augmented second, and the melodic minor smoothed it away. Music further east kept the leap: Eastern Ashkenazi prayer, klezmer, Romanian and Greek dance music, and flamenco all treat the augmented second as a colour rather than a problem.
This page is a lesson, not a poster. Read it top to bottom; every section has something to press, and the whole page follows one root and one octave — change either and everything below changes with it. If the low keys are hard to hear on your speaker, use Octave + to lift the whole lesson.
1. Start from the scale you already know: natural minor
A is a short list of the twelve piano notes that a piece treats as home. The natural minor scale is the dark, settled one: in A it runs 1 2 ♭3 4 5 ♭6 ♭7. The flats mean “one key lower than the major scale would have it” — the lowered third is what makes any scale sound minor. Press Play and get the shape of it in your ear, because the next section changes exactly one of these notes.
2. Move one key: raise the seventh
Take the ♭7 — in A that is G — and push it up one key to G♯. Nothing else changes. That single move turns natural minor into harmonic minor: 1 2 ♭3 4 5 ♭6 7. Flip the toggle and watch one key go dark while its neighbour lights up, then play both runs back to back. The top of the scale is where you will hear it.
Natural minor keeps every other note but changes 7 (G♯) to ♭7 (G). Flip the toggle and watch one key go dark while its neighbour lights up.
Why does it matter so much? The raised 7 now sits one key below the . A note that close to home leans into it — play G♯ and your ear is already waiting for A. Musicians call that note a leading tone. Natural minor has no leading tone (its ♭7 is two keys away); harmonic minor borrows one from the major scale.
3. Counting from home: the seven degrees
Every note in a scale is named by how far above the root it sits — its . Count keys to the right of the root, black and white alike; each key is a . The table is live: change the root at the top and the third column follows.
| Degree | Half steps (keys) above the root | In A | What it is |
|---|---|---|---|
| 1 | 0 | A | the root — home |
| 2 | 2 | B | second |
| ♭3 | 3 | C | lowered third — what makes it minor |
| 4 | 5 | D | fourth |
| 5 | 7 | E | fifth |
| ♭6 | 8 | F | lowered sixth |
| 7 | 11 | G♯ | raised seventh — the changed note |
Click a chip to hear each degree in A. The keyboard labels black keys with sharps and this page spells the scale one letter per degree, so the raised seventh reads G♯ even where a flat name would be the same key.
4. The gap it opens: the augmented second
Moving the seventh up leaves a hole behind it. From ♭6 (F) to 7 (G♯) is now three half steps — wider than any step in the major scale, which never goes past two. Because it is still written as one step from one degree to the next, it has a name of its own: the . On the keyboard it covers the same distance as a minor third, but it behaves like a step — you walk it, you do not leap it.
This is the sound people describe as “Eastern” or “exotic” when they meet it in Western music. Classical composers treated it as something to avoid in a melody — the melodic minor scale exists to smooth it away by raising the sixth too. Eastern Ashkenazi prayer, klezmer (כּלי־זמר) , Romanian and Greek dance music, and flamenco went the other way and made the leap the point.
5. Why it is called “harmonic”
Build a three-note chord on the fifth degree — 5, 7, and the 2 above it. In natural minor that chord is minor. In harmonic minor the raised 7 makes it major, and a major chord on the fifth pulls hard toward the root. Western harmony wanted that pull in minor keys, and raised the seventh to get it. The scale is named after the chord it was built to supply: the .
6. Same keys, different home: freygish and Ukrainian Dorian
Here is the reason this page comes first. Take the seven keys of A harmonic minor and, without adding or removing any, call the 5 home instead. You now have freygish — the signature mode of klezmer, also called Ahava Rabbah (אהבה רבה) — starting on E. The augmented second is the same two keys; it now sits between the new scale’s ♭2 and 3. Flip the toggle: nothing turns on or off, only the green 1 moves.
A harmonic minor uses exactly the same keys as E freygish. Nothing turns on or off — only 1 moves. Home is now A, which was the 4 of E freygish. Play both runs and hear how the same notes settle in a different place.
Do it again with the 4 as home (D) and you get Ukrainian Dorian — Mi Sheberakh (מי שברך) to klezmer players, the mode of the (doină). The leap now sits between ♭3 and ♯4.
A harmonic minor uses exactly the same keys as D ukrainian dorian. Nothing turns on or off — only 1 moves. Home is now A, which was the 5 of D ukrainian dorian. Play both runs and hear how the same notes settle in a different place.
One honesty note. Western theory files freygish and Ukrainian Dorian as the fifth and fourth of harmonic minor — that is the relationship these keyboards show, and it is true of the notes. Klezmer musicians do not think of them that way. They are prayer modes in their own right, named after the chants sung in them, and in the dance collections they are at least as common as plain minor. The harmonic-minor framing is a map, not the territory.
7. What to do with it
Keep the lock on and improvise on the green keys. End phrases on 1; approach it from 7 underneath and feel the pull. Walk ♭6 → 7 slowly and let the wide step be strange. Then go hear the same seven keys from their other two homes — What is the freygish scale? and What is the Ukrainian Dorian scale? — and What is klezmer? for the music that lives in them.
Quick reference
- Formula
- 1 – 2 – ♭3 – 4 – 5 – ♭6 – 7
- In A
- A – B – C – D – E – F – G♯