Space plays and stops
- Notes and intervals
- Dm3Fm3Abm3Cb
D Diminished 7, written Ddim7, is built from D, F, Ab and Cb: the root, minor 3rd, flat 5th and diminished 7th.
Its 3rd and 7th, F and Cb, are its guide tones: they say what kind of chord it is, so voicings are built around them and the root is often left to the bass.
In the progressions here, Ddim7 is the ♯i°7 of the Diminished Passing Turnaround in Db and the ♯iv°7 of the Jazz Blues in Ab.