Keep A as the reference point
Natural, harmonic and melodic minor are easier to compare when the tonic stays the same. Start with A natural minor: A, B, C, D, E, F, G. It uses the same pitch classes as C major, but A is the tonic and C is its minor third.
Play A first and return to it at the end of the phrase. Simply using a collection of white keys does not establish which note acts as home; the way you emphasize and return to a tonic matters.
Hear natural minor without a raised leading tone
The seventh degree of A natural minor is G. G is two semitones below the next A. Notice that whole-tone gap at the top of the scale, then descend through the same notes. Natural minor does not change its collection merely because the direction changes.
The half steps B–C and E–F fall between degrees 2–3 and 5–6. These locations distinguish its pattern from the major scale, even though A natural minor and C major share the same piano keys.
Raise only the seventh for harmonic minor
A harmonic minor changes G to G-sharp and retains F natural. G-sharp is now one semitone below A. The gap from F to G-sharp is three semitones, a written augmented second. Read both the note names and the distance.
That G-sharp also changes a chord built on E. E–G–B becomes E–G-sharp–B, making the fifth-degree triad major. This is one reason the raised seventh is useful in tonal minor harmony, but it does not mean every passage in A minor must use it.
State the melodic-minor convention
In the classical ascending form, raise both F and G: A, B, C, D, E, F-sharp, G-sharp, A. The traditional descending form returns through A, G, F, E, D, C, B, A. The raised sixth removes the augmented-second gap of the harmonic form on the way up.
A fixed melodic-minor collection, often used in jazz-theory contexts, keeps the raised form when descending too. The label on your tool or exercise must say which convention is intended; otherwise a correct performance under one convention can look wrong under the other.
Count the gap from F to G-sharp in A harmonic minor: it spans three semitones and is written as an augmented second. In natural minor, F to G spans two. In the melodic ascent, F-sharp to G-sharp also spans two. Comparing this single gap helps explain why the raised sixth changes the contour even though all three versions retain the same tonic and minor third.
| Form | Sixth | Seventh | Direction convention |
|---|---|---|---|
| Natural minor | F | G | Same notes both ways |
| Harmonic minor | F | G♯ | Same notes both ways |
| Classical melodic minor | F♯ up; F down | G♯ up; G down | Different ascent and descent |
Change one thing at a time
Begin with the upper four notes E, F, G, A. Compare E, F, G-sharp, A, then E, F-sharp, G-sharp, A. This short section contains every alteration, so you can hear the difference without replaying the full scale each time.
After that comparison, restore the complete scale. Keep C natural in every version: changing it to C-sharp would remove the minor third that these three A-minor forms share.
Make a reference that names the form
Save the form and direction with your example. A page labeled only “A minor” is less informative than one that states natural minor or classical melodic minor and shows the actual notes.
- Read the natural-minor notes aloud before playing.
- Raise only G for harmonic minor.
- Raise F and G for the classical ascent, then return to the natural notes descending.
- Compare the note list with the diagram before exporting.
Sources and methods
Put it into practice.
Explore these notes and relationships in the interactive tools.