Also A♭ Major (Ionian), B♭ Dorian
F Natural minor (Aeolian): F G A♭ B♭ C D♭ E♭. Formula 1 2 ♭3 4 5 ♭6 ♭7. Same notes as A♭ Major (Ionian), B♭ Dorian, C Phrygian. The natural minor scale: sad and serious, the basis of minor keys in rock, pop and classical music.