For example : D ♭ minor key signature : E ♭ + A ♭ + D ♭ + G ♭ + C ♭ + F ♭ + B ( the B is now double flatted and therefore , notated after the single accidentals , which obviously do not include the B ♭ ) D ♭ natural minor = D ♭ E ♭ F ♭ G ♭ A ♭ B C ♭ D ♭ D ♭ melodic minor ( ascending and descending ) = D ♭ E ♭ F ♭ G ♭ A ♭ B ♭ C D ♭ C ♭ B A ♭ G ♭ F ♭ E ♭ D ♭ D ♭ harmonic minor = D ♭ E ♭ F ♭ G ♭ A ♭ B C D ♭ In the Western system , derived from the Greek system of modes , the principal scale that includes the minor third is the Aeolian mode , with the minor third also occurring in the Dorian mode and the Phrygian mode .
Harmonic Minor Scale : 1 2 3 ♭ 4 5 6 ♭ 7 8 For example , in the key of A minor , the harmonic minor scale is : A B C D E F G ♯ A Play ( info \* help ) One way the harmonic minor is different to the natural minor is that it has two chords which have the same structure when inverted , so they do not belong to any key .