Ab7#9b13 Dominant 7th
The Ab7#9b13 chord is built from the notes Ab – C – Eb – Gb – B – Fb.
Piano sound loads on first tap.
Also known as
Ab7(#9,b13)Ab7(#9b13)Ab7(b13#9)
Chord tones, one by one
AbRoot
Root
The fundamental note the chord is built on — Ab.
CThird
Major third
Four semitones — makes the chord major (brighter, happier).
EbFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
GbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
BExtension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
FbExtension
Flat thirteenth (♭13)
A ♭13 — dark altered tension over a dominant chord.
🎼 Related scales
Phrygian ♭4harmonic major scale
🎹 Modal analysis
This chord implies the Phrygian ♭4 scale; its characteristic note is the ♭4 (enharmonic major 3rd). It is a mode of the harmonic major scale.
🎸 Genres
Modern jazz · Post-bop · Fusion