Db
Db7b5
Notes
Db · F · Abb · Cb
Intervals
- RootDb (1P)
- Major 3rdF (3M)
- Diminished 5thAbb (5d)
- Minor 7thCb (7m)
Fretboard
On the fretboard, Ab represents Abb, and B represents Cb.
Adjust labels, frets, and palette in the interactive view.
About
The D♭7♭5 (D♭–F–A♭♭–C♭) lowers the fifth, replacing the stable perfect fifth with a tritone above the root. Combined with the tritone already present between 3rd and ♭7, the chord contains two tritones — making it extremely unstable and dissonant. In jazz, 7♭5 functions as an altered dominant with a particular flavour of harmonic restlessness. The 3rd, ♭7, and ♭5 are all essential; the A♭♭ is the defining alteration, and omitting it leaves a plain D♭7. It resolves typically to G♭ or G♭m. Compared to standard D♭7, 7♭5 is considerably more harmonically tense.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- A♭ Diminished (deg 4)
- A♭ Melodic Minor (IV)
- B Diminished (deg 2)
- D Diminished (deg 8)
- E♭ Natural Minor (VII)
- F Diminished (deg 6)
- F♯ Harmonic Minor (V)
- F♯ Major (V)
- F♯ Melodic Minor (V)
- D♭ Mixolydian (I)
- A♭ Dorian (IV)
- B Lydian (II)
- B♭ Phrygian (III)
- F Locrian (VI)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.