Gb9 Guitar Chord | Play, Hear and Practice Interactively
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Gb9, the Gb dominant ninth chord, is spelled Gb, Bb, Db, Fb and Ab. It sounds identical to F#9, and the Fb is simply a theoretical spelling of E.
Six voicings are listed, three of them barres, none with an open string, and the lowest is at the 1st fret. Charts usually print the F# version of this sound, because it needs no Fb. The Fb is the flat seventh and the Ab is the ninth. The Gb Mixolydian scale contains every chord note.
Hear each shape strummed and as an arpeggio in the player above.
Gb dominant 9th guitar chord is also written as Gb9, Gbdom9, Gb7(9) or Gb7add9.
Gb9 Chord Notes and Formula
Notes in the Gb 9 chord:
Tones of the Dominant Ninth chord:
Formula: 1 3 5 b7 9
Same chord, different name: Gb9 is also written as F#9 (F# dominant ninth).
Gb9 Chord Interactive Fretboard
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Gb9 Guitar Chord Diagrams
Position 1 Barre Movable
Gb Dominant Ninth Finger Positions
- Mute the low E string
- Mute the A string
- Place your index finger (1) on the fret 4 of the D and high E strings at the same time
- Place your middle finger (2) on the fret 5 of the B string
- Place your ring finger (3) on the fret 6 of the G string
Position 2 Movable Slash Chord
Gb/Fb Dominant Ninth Finger Positions
- Mute the low E string
- Mute the A string
- Place your index finger (1) on the fret 1 of the G string
- Place your middle finger (2) on the fret 2 of the D string
- Place your ring finger (3) on the fret 2 of the B string
- Place your pinky finger (4) on the fret 2 of the high E string
The lowest note is Fb, not the root, so this voicing is the slash chord Gb9/Fb.
Position 3 Movable
Gb Dominant Ninth Finger Positions
- Mute the low E string
- Mute the high E string
- Place your index finger (1) on the fret 8 of the D string
- Place your middle finger (2) on the fret 9 of the A string
- Place your ring finger (3) on the fret 9 of the G string
- Place your pinky finger (4) on the fret 9 of the B string
Position 4 Movable Slash Chord
Gb/Db Dominant Ninth Finger Positions
- Mute the A string
- Mute the high E string
- Place your index finger (1) on the fret 8 of the D string
- Place your middle finger (2) on the fret 9 of the low E string
- Place your ring finger (3) on the fret 9 of the G string
- Place your pinky finger (4) on the fret 9 of the B string
The lowest note is Db, not the root, so this voicing is the slash chord Gb9/Db.
Position 5 Barre Movable Slash Chord
Gb/Bb Dominant Ninth Finger Positions
- Mute the low E string
- Mute the A string
- Place your index finger (1) on the fret 8 of the D string
- Place your ring finger (3) on the fret 9 of the G, B and high E strings at the same time
The lowest note is Bb, not the root, so this voicing is the slash chord Gb9/Bb.
Position 6 Barre Movable
Gb Dominant Ninth Finger Positions
- Mute the low E string
- Place your index finger (1) on the fret 8 of the D string
- Place your middle finger (2) on the fret 9 of the A string
- Place your ring finger (3) on the fret 9 of the G, B and high E strings at the same time
Find more shapes in our all guitar chords online library. If you
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Chords That Go With Gb9
One key where Gb9 fits is Cb major, where it works as the V chord. These are the main chords of that key, the ones you will often hear around it:
See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.
More Gb Chords
Want to know how this chord is built? Read ninth and add9 chords explained, or browse all Gb guitar chords.
Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes make up Gb dominant ninth?
Gb9 is Gb, Bb, Db, Fb and Ab. The Fb is the minor seventh and sounds like E, and the Ab is the ninth.
Is Gb9 the same as F#9?
Yes. F#9 uses F#, A#, C#, E and G#, which are the same five pitches. Gb9 suits flat-key writing, while F#9 suits sharp keys.
Why is Gb9 written with Fb?
The seventh must use the letter F, since the root letter is G. A minor seventh is a semitone lower than F, so Fb is used, even though it sounds like E.
How many voicings does Gb9 have on the fretboard?
There are 6 voicings, from fret 1 to fret 9. Three are barre voicings and none uses an open string.
Which scale goes with Gb9?
Gb Mixolydian is Gb, Ab, Bb, Cb, Db, Eb and Fb. All five chord notes are in it, and the Ab is the ninth.
