Harmonic minors use the relative major key signature and raise the seventh note of the scale. For example, in A harmonic minor there are no sharps or flats other than the raised seventh of G#.

There are other scales, such as the Dorian mode (1-2-b3-4-5-6-b7), but the minor pentatonic and natural minor are the ones we usually learn first. By contrast, the harmonic minor has a unique ...