Db Diminished 7th
Dbdim7
Notes
Db · Fb · Abb · Cbb
Intervals
- RootDb (1P)
- Minor 3rdFb (3m)
- Diminished 5thAbb (5d)
- Diminished 7thCbb (7d)
Fretboard
On the fretboard, E represents Fb, Ab represents Abb, and Bb represents Cbb.
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About
The D♭ fully diminished 7 (D♭–F♭–A♭♭–C♭♭) stacks four minor thirds, giving it a fully symmetrical structure. Each note can be respelled as a root — D♭°7 is enharmonically the same chord as F♭°7, A♭♭°7, and C♭♭°7 — meaning a single shape on the guitar can function as four different leading-tone chords depending on context. This flexibility makes dim7 especially useful as a passing or substitution chord, often resolving up a half step (here to E♭♭). All four tones carry the chord’s identity; the chord is defined by its symmetry, so removing any note weakens that quality. On guitar, one shape repeats identically every three frets. Compared to D♭m7♭5, dim7 is more unstable and dramatically tense.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- D♭ Diminished (deg 1)
- D♭ Harmonic Minor (I)
- D♭ Melodic Minor (I)
- D♭ Natural Minor (I)
- A♭ Diminished (deg 4)
- A♭ Harmonic Minor (IV)
- A♭ Natural Minor (IV)
- B Diminished (deg 2)
- B Major (II)
- B Melodic Minor (II)
- B♭ Blues (deg 2)
- D Diminished (deg 8)
- F Diminished (deg 6)
- F Harmonic Minor (VI)
- D♭ Dorian (I)
- D♭ Locrian (I)
- D♭ Phrygian (I)
- A♭ Locrian (IV)
- A♭ Phrygian (IV)
- B♭ Locrian (III)
- E Lydian (VI)
- E♭ Locrian (VII)
- E♭ Phrygian (VII)
- F♯ Mixolydian (V)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.