8 notes · alternating whole and half steps
Eight notes built by alternating a tone and a semitone. It repeats every minor third, so it is really only three different scales, and each of them is the scale of four diminished seventh chords at once.
Heard in: Over a dim7 chord; Stravinsky, bebop turnarounds, horror scoring.
The whole scale, with each note’s degree underneath it.
Every degree of this scale builds a diminished seventh, because the scale repeats every minor third. There are only three of these scales altogether, and each holds two diminished sevenths whose eight notes are the whole scale.
The chords on Bb whose every note this scale contains, biggest first. The largest of them is the one that pins the scale down: over Bbdim7 there is nothing in Bb diminished that can sound wrong.
Every scale on every root is on the scale index, and every chord on the chord index. Where the shapes and the theory come from is on the about page.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.