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D Diminished 7th Chord
The D Diminished 7th Chord is D, F, A-flat, and C-flat. The C-flat is the white key B, so only the A-flat is a black key. The notes are evenly spaced, and the chord keeps the same shape and the same tense, unsettled sound through each inversion.
How to play the D Diminished 7th Chord on the piano
Let’s go through some charts that will familiarize you with the D Diminished 7th Chord and how to play it in the various forms you will encounter in pieces of music. First, we’ll look at the fundamental chord and its inversions; then, we’ll explore some more complex voicings.
The D Diminished 7th Chord in root position
In root position, the notes of the D diminished 7th chord are stacked in thirds with D on the bottom. The appearance on the staff is evenly spaced, as is the feeling of the space in between your fingers while playing.
| D Diminished 7th Chord in root position | |
|---|---|
| Note Order | D F A♭ C♭ |
| Left Hand Fingering | 5 3 2 1 |
| Right Hand Fingering | 1 2 3 5 |
| Chord Symbol | Ddim7 or D°7 |
The D Diminished 7th Chord in first inversion
In first inversion, the third of the chord (F) becomes the bottom note, and the root (D) jumps up to the top.
| D Diminished 7th Chord in 1st inversion | |
|---|---|
| Note Order | F A♭ C♭ D |
| Left Hand Fingering | 5 3 2 1 |
| Right Hand Fingering | 1 2 3 5 |
| Chord Symbol | D°6/5 or D°7/F |
The D Diminished 7th Chord in second inversion
In second inversion, the fifth of the chord (A♭) is on the bottom, and the third of the chord (F) goes to the top.
| D Diminished 7th Chord in 2nd inversion | |
|---|---|
| Note Order | A♭ C♭ D F |
| Left Hand Fingering | 5 3 2 1 |
| Right Hand Fingering | 1 2 3 5 |
| Chord Symbol | D°4/3 or D°7/A♭ |
The D Diminished 7th Chord in third inversion
In third inversion, the seventh of the chord (C♭) is on the bottom, and the fifth of the chord (A♭) goes to the top.
| D Diminished 7th Chord in 3rd inversion | |
|---|---|
| Note Order | C♭ D F A♭ |
| Left Hand Fingering | 5 3 2 1 |
| Right Hand Fingering | 1 2 3 5 |
| Chord Symbol | D°4/2 or D°7/C♭ |
D Diminished 7th Chord theory and function
The diminished 7th stacks three minor thirds, and every interval is the same size. That symmetry gives the chord a tense, suspended sound, and it is the most flexible chord for changing keys: the same four notes can lead to four different places.
The D diminished 7th chord is the leading-tone chord (vii°7) in E♭ major. In minor keys, it is the leading-tone chord (vii°7) in E♭ minor.
It works like a dominant 7th chord with a flat ninth and the root missing: D°7 is the upper four notes of B♭7♭9, so it resolves to E♭ the way B♭7 does. It is also a passing chord that slides between two chords: D♭ – D°7 – E♭m7, and the bass line simply climbs by half step. Try playing it once and resolve up a half step from each of its four notes in turn, and listen to how the same chord points to four different keys.
Other chords built on D
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