G7(b13) Guitar Chord Chart | G Dominant Seventh Flat Thirteen Added
G7(b13) (G seventh flat thirteen) follows the formula 1, 3, 5, b7, b13, so on G it reads G, B, D, F and Eb. The flat thirteenth sits only a half step above the natural fifth D, so those two notes crowd each other.
Start from the dominant seventh G7 (G, B, D, F) and the flat thirteenth Eb is the note that sets this chord apart. Every tone of G7(b13) sits inside the G Phrygian Dominant scale, the fifth mode of the harmonic minor scale, so it is a natural pool of notes for lines over the chord.
Leave out the flat thirteenth Eb and what remains is the dominant seventh G7 (G, B, D, F).
G 7th with flat 13th guitar chord is also written as G7(b13), G7b13 or G7-13.
Notes that compose the G 7(b13) chord:
Chord formula for the Dominant Seventh Flat Thirteen Added chord:
Formula: 1 3 5 #5 b7
G 7(B13) Chord Interactive Fretboard
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Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in G7(b13)?
G, B, D, F and Eb. The first four make a G seventh chord, and Eb is the flat thirteenth, a minor sixth from the root one octave up.
What is the flat thirteenth in G7(b13)?
It is Eb, the thirteenth degree, E, lowered by a half step. It lies only a half step higher than the fifth, D, so those two notes sit close together.
Which scale fits the G seventh flat thirteen chord?
The G Mixolydian b6 scale, spelled G, A, B, C, D, Eb and F, contains all five chord tones. It is the fifth mode of C melodic minor.
How does G7(b13) differ from a plain G7?
A plain G7 has G, B, D and F. G7(b13) adds Eb, which sits a half step higher than the fifth D and gives the chord a darker colour.
Where does G7(b13) usually lead?
A dominant seventh tends to resolve up a fourth, so G7(b13) leads to C. The flat thirteenth suits a resolution to C minor.
