root position: Ddim7
D – F – A♭ – C♭
The D diminished 7 chord (Ddim7) is made of the notes D, F, A♭ and C♭. Its formula is 1 – ♭3 – ♭5 – 𝄫7.
| Note | Formula | Interval from root |
|---|---|---|
| D | 1 | root |
| F | ♭3 | minor 3rd |
| A♭ | ♭5 | diminished 5th |
| C♭ | 𝄫7 | diminished 7th |
Fingers are numbered from the thumb (1) to the little finger (5).
D – F – A♭ – C♭
F – A♭ – C♭ – D
A♭ – C♭ – D – F
C♭ – D – F – A♭
Ddim7 is also written as D°7.
Ddim7 is not one of the basic chords of any major or minor key. It is usually used as a passing or colour chord.