The A diminished whole–half scale has 8 notes: A, B, C, D, Eb, F, F# and G#. Its formula is 1 2 b3 4 b5 #5 6 7 and its steps, in tones, are 1 – ½ – 1 – ½ – 1 – ½ – 1 – ½.
The whole–half diminished scale alternates a tone and a semitone: eight symmetrical notes, used in jazz over diminished chords.
A diminished whole–half
A B C D Eb F F# G# · 1 2 b3 4 b5 #5 6 7
Colored dots: notes of the scale, the root is the darkest.