Minor Scales

Natural, Harmonic, and Melodic Forms

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Minor scales are a core part of music theory because they shape the darker, more tense, or more expressive sound heard in many songs and compositions. The three common forms are natural minor, harmonic minor, and melodic minor. Each form starts from the same tonic but changes certain scale degrees to create a different pattern of intervals. Learning these patterns helps students read music, build melodies, and understand chords in minor keys.

Natural minor follows the key signature exactly, while harmonic minor raises the 7th scale degree to create a stronger pull back to the tonic. Melodic minor usually raises both the 6th and 7th scale degrees when ascending, then returns to the natural minor form when descending in traditional theory. These small note changes strongly affect the sound and function of the scale. They also change the chords and melodic motion available in a minor key.

Key Facts

Natural minor interval pattern: W H W W H W W
Harmonic minor = natural minor with a raised 7th scale degree
Melodic minor ascending = natural minor with raised 6th and 7th scale degrees
Melodic minor descending = natural minor in traditional classical theory
Relative minor starts on the 6th degree of a major scale, for example A minor is the relative minor of C major
A natural minor: A B C D E F G A; A harmonic minor: A B C D E F G# A; A melodic minor ascending: A B C D E F# G# A

Vocabulary

Tonic: The tonic is the home note of a scale or key and gives the music a sense of rest.
Scale degree: A scale degree is the position of a note within a scale, counted from the tonic.
Leading tone: A leading tone is a note one half step below the tonic that strongly resolves upward to it.
Relative minor: A relative minor is the minor key that shares the same key signature as a major key.
Interval: An interval is the distance in pitch between two notes.

Common Mistakes to Avoid

Using the natural minor notes for every situation, which is wrong because harmonic and melodic minor change specific scale degrees for harmonic or melodic purposes.
Forgetting to raise the 7th in harmonic minor, which is wrong because the raised 7th creates the leading tone that strengthens resolution to the tonic.
Raising the 6th and 7th in melodic minor both ascending and descending in traditional classical exercises, which is wrong because descending melodic minor usually returns to the natural minor form.
Confusing relative minor with parallel minor, which is wrong because relative keys share a key signature while parallel keys share the same tonic.

Practice Questions

1 Write the notes of E natural minor, E harmonic minor, and E melodic minor ascending.
2 A natural minor scale has the notes D E F G A Bb C D when starting on D. Write the D harmonic minor scale and the D melodic minor scale ascending.
3 Explain why composers often use harmonic minor instead of natural minor when they want a stronger resolution back to the tonic.