Eb
Eb7b5
Notes
Eb · G · Bbb · Db
Intervals
- RootEb (1P)
- Major 3rdG (3M)
- Diminished 5thBbb (5d)
- Minor 7thDb (7m)
Fretboard
On the fretboard, Bb represents Bbb.
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About
The E♭7♭5 (E♭–G–B♭♭–D♭) 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 B♭♭ is the defining alteration, and omitting it leaves a plain E♭7. It resolves typically to A♭ or A♭m. Compared to standard E♭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 5)
- A♭ Harmonic Minor (V)
- A♭ Major (V)
- A♭ Melodic Minor (V)
- B♭ Diminished (deg 4)
- B♭ Melodic Minor (IV)
- E Diminished (deg 8)
- F Natural Minor (VII)
- G Diminished (deg 6)
- E♭ Mixolydian (I)
- B♭ Dorian (IV)
- C Phrygian (III)
- D♭ Lydian (II)
- G 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.