Octatonic scale scale" . The twelve tones of the chromatic scale are covered by three disjoint diminished seventh chords. The notes from two such seventh-chords combination form an octatonic collection. Because there are three ways to select two from three, there are three octatonic scales in the twelve-tone system. Each octatonic scale has exactly two modes: the first begins its ascent with a whole step, while the second begins its ascent with a half step (semitone). These modes are sometimes referred to as the "whole step/half-step diminished scale" and the "half-step/whole step diminished scale", respectively. Each of the three distinct scales can
Bebop scale Harris. Ben-Hur further elaborates on the concept of placing additional chromatic passing tones between other notes in the scales. The bebop harmonic minor scale (or bebop natural minor scale, as listed in Mark Levine's "The Drop 2 Book") is derived from the harmonic minor scale and has a chromatic passing tone (an additional 7) between the 6th and the 7th notes. \override Score.TimeSignature #'stencil = ##f \relative c' { </score> It contains all of the notes of both the harmonic minor scale and the natural minor scale (Aeolian mode) of the same root. It can be used on all three