The D diminished half–whole scale has 8 notes: D, Eb, F, F#, G#, A, B and C. Its formula is 1 b2 #2 3 #4 5 6 b7 and its steps, in tones, are ½ – 1 – ½ – 1 – ½ – 1 – ½ – 1.
The half–whole diminished scale alternates a semitone and a tone: eight symmetrical notes, used in jazz over altered dominant chords.
D diminished half–whole
D Eb F F# G# A B C · 1 b2 #2 3 #4 5 6 b7
Colored dots: notes of the scale, the root is the darkest.