Gb Dominant Seventh Flat Thirteen Added Guitar Chord Charts & Variations

Gb seventh flat thirteen is the full name of Gb7(b13), a chord of five notes: Gb, Bb, Db, Fb and Ebb. The flat thirteenth sits only a half step above the natural fifth Db, so those two notes crowd each other.

Two notes carry the dominant pull, the major third Bb and the minor seventh Fb, which sit a tritone apart. It sounds identical to F#7(b13), the same chord under a different spelling. When you improvise over this chord, try the Gb Mixolydian b6 scale, the fifth mode of the melodic minor scale, which covers all five chord tones.

Leave out the flat thirteenth Ebb and what remains is the dominant seventh Gb7 (Gb, Bb, Db, Fb).

Gb 7th with flat 13th guitar chord is also written as Gb7(b13), Gb7b13 or Gb7-13.

Gb7(b13) Chord Notes and Formula

Gb 7(b13) chord Notes:

Gb Bb Db Fb Ebb

Chord structure of the Dominant Seventh Flat Thirteen Added chord:

Formula: 1 3 5 #5 b7

Same chord, different name: Gb7(b13) is also written as F#7(b13) (F# seventh flat thirteen).

Gb 7(B13) Chord Interactive Fretboard

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Chords That Go With Gb7(b13)

One key where Gb7(b13) fits is B major, where it works as the V chord. These are the main chords of that key, the ones you will often hear around it:

I · B ii · C#m iii · D#m IV · E V · F# vi · G#m

See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.

More Gb Chords

Gb Gbm Gb7 Gbm7 Gbmaj7 Gbsus4 Gbsus2 Gbadd9 Gbdim Gb9 Gb7(b9) Gb7(#11) Gb7#5 Gb7#9

Want to know how this chord is built? Read dominant chords explained, or browse all Gb guitar chords.

Play This Chord With Other Roots

C 7(b13) | D 7(b13) | E 7(b13) | F 7(b13) | G 7(b13) | A 7(b13) | B 7(b13) | C#7(b13) | D#7(b13) | F#7(b13) | G#7(b13) | A#7(b13) | Ab7(b13) | Bb7(b13) | Db7(b13) | Eb7(b13) | Gb7(b13)

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Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

Which notes are in the Gb seventh flat thirteen chord?

Gb, Bb, Db, Fb and Ebb. The Fb sounds like E natural and the Ebb, the flat thirteenth, sounds like D natural.

Is Gb7(b13) the same chord as F#7(b13)?

Yes, they share the same pitches. F#7(b13) is spelled F#, A#, C#, E and D, while Gb7(b13) uses Gb, Bb, Db, Fb and Ebb. The sound is identical.

Why does Gb7(b13) include Fb and Ebb?

Chord letters stack as G, B, D, F and, for the thirteenth, E. The minor seventh is Fb and the flat thirteenth is Ebb, keeping each degree on its own letter.

Which scale can I use over Gb7(b13)?

The Gb Mixolydian b6 scale, spelled Gb, Ab, Bb, Cb, Db, Ebb and Fb, contains all five chord tones. It is the fifth mode of the melodic minor scale.

Which note is the flat thirteenth in Gb7(b13)?

It is Ebb, a minor sixth from Gb one octave up. It lies a half step higher than the perfect fifth, Db.