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The harmonic minor scale (or Aeolian ♮7 scale) is a musical scale derived from the natural minor scale, with the minor seventh degree raised by one semitone to a major seventh, [2] [3] [4] creating an augmented second between the sixth and seventh degrees.
The harmonic minor scale (or Aeolian ♯ 7 scale) has the same notes as the natural minor scale except that the seventh degree is raised by one semitone, creating an augmented second between the sixth and seventh degrees.
A harmonized scale can be created by using each note of a musical scale as a root note for a chord and then by taking other tones within the scale building the rest of a chord. [3] For example, using an Ionian (major scale) the root note would become the I major chord, the second note the ii minor chord, the third note the iii minor chord,
The seventh scale degree is very often raised a half step to form a leading tone, making the dominant chord (V) a major chord (i.e. V major instead of v minor) and the subtonic chord (vii), a diminished chord (vii o, instead of ♭ VII). This version of minor scale is called the harmonic minor scale.
The chord occurs on the tonic when harmonizing the harmonic minor scale in seventh chords. That is, the first, third, fifth, and seventh scale degrees of the harmonic minor scale form a minor major seventh chord, as shown below.
minor: harmonic — Harmonic Scale: Harmonic scale chromatic on C. Play ...
The minor seventh plays the ii 7, iii 7, and vi 7 roles. The half-diminished seventh plays the vii ø 7 role. While absent from the tertian harmonization of the major scale, The diminished seventh plays the vii o 7 role in the tertian harmonization of the harmonic minor scale. [81]
In contrast, in the chord-scale system, a different scale is used for each chord in the progression (for example mixolydian scales on A, E, and D for chords A 7, E 7, and D 7, respectively). [5] Improvisation approaches may be mixed, such as using "the blues approach" for a section of a progression and using the chord-scale system for the rest. [6]