Space plays and stops
- Notes and intervals
- D#m3F#m3Am3C
D# Diminished 7, written D#dim7, is built from D#, F#, A and C: the root, minor 3rd, flat 5th and diminished 7th.
Its 3rd and 7th, F# and C, 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, D#dim7 is the ♯i°7 of the Diminished Passing Turnaround in D and the ♯iv°7 of the Jazz Blues in A.