Gb-7#5#9b13 Augmented
The Gb-7#5#9b13 chord is built from the notes Gb – Bbb – D – Fb – A – Ebb.
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Also known as
Gbm7#5#9b11b13
Chord tones, one by one
GbRoot
Root
The fundamental note the chord is built on — Gb.
BbbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
DFifth
Augmented fifth (♯5)
Eight semitones — a sharp fifth. Restless and dreamy, typical of augmented chords.
FbSeventh
Minor seventh (♭7)
Ten semitones — the dominant/minor seventh. Adds bluesy tension (7, m7).
AExtension
Sharp ninth (♯9)
A ♯9 — the gritty 'Hendrix' tension over a dominant chord.
EbbExtension
Flat thirteenth (♭13)
A ♭13 — dark altered tension over a dominant chord.
🎼 Related scales
🎹 Modal analysis
This chord implies the Aeolian (natural minor) scale; its characteristic note is the dark ♭6.
🎸 Genres
Rock · Pop · Cinematic