Gb11b9 Dominant 7th
The Gb11b9 chord is built from the notes Gb – Bb – Db – Fb – Abb – Cb.
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Chord tones, one by one
GbRoot
Root
The fundamental note the chord is built on — Gb.
BbThird
Major third
Four semitones — makes the chord major (brighter, happier).
DbFifth
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
FbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
AbbExtension
Flat ninth (♭9)
A ♭9 — sharp, dissonant tension typical of altered dominant chords.
CbExtension
Eleventh (11)
An 11th — a suspended, airy color on top of the chord.
🎼 Related scales
Phrygian dominantharmonic minor a perfect 5th below
🎹 Modal analysis
This chord implies the Phrygian dominant scale; its characteristic note is the ♭9 / ♭2. It is a mode of the harmonic minor a perfect 5th below.
🎸 Genres
Flamenco · Middle-Eastern · Klezmer · Neoclassical metal