B♭ Diminished (half-whole)

B♭ Diminished (half-whole): B♭ C♭ C# D E F G A♭. Formula 1 ♭2 ♯2 3 ♯4 5 6 ♭7. Same notes as D♭ Diminished (half-whole), E Diminished (half-whole), G Diminished (half-whole). Half and whole steps in turn, starting with a half step: the scale jazz players use over dominant chords with ♭9 and ♯9. It repeats every minor 3rd.