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G7♭9 Chord: Guitar, Piano and Notes

The G7♭9 chord is a altered dominant seventh chord built on the root note G. Its notes are G, B, D, F and A♭.

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Short answer

Dominant seventh flat nine chords sound dark and urgent. Stacking a minor ninth on a dominant seventh tightens the tension already built into the tritone, which makes the chord a strong pull toward a minor tonic.

Notes
G · B · D · F · A♭
Formula
1 · 3 · 5 · ♭7 · ♭9
Semitones
0 · 4 · 7 · 10 · 13
Note
G
Quality
Dominant 7♭9
Symbol
G7♭9

G7♭9 on piano

5 notes
View:
Piano diagram of the G7♭9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play G7♭9 on piano, place your right hand with your thumb on G, index finger on B, middle finger on D, ring finger on F and little finger on A♭. Press the keys together and listen for an even sound. On the keyboard A♭ is a black key and G, B, D and F are white. Practice moving in and out of the chord slowly, then bring in a metronome.

  • G1
  • B3
  • D5
  • F♭7
  • A♭♭9

G7♭9 on guitar

View:
Guitar chord diagram of the G7♭9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, G7♭9 is commonly played with the voicing shown above. The fretted notes sit between frets 1 and 3. Strings 4 and 2 ring open.

G · B · D · F · A♭

Play G7♭9 on the online piano

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G7♭9 chord notes

DegreeIntervalSemitonesNoteHear
1Root0G
3Major third4B
5Perfect fifth7D
♭7Minor seventh10F
♭9Minor ninth13A♭(Ab)

How to use the G7♭9 chord

The G7♭9 chord is built from a root, a major third, a perfect fifth, a minor seventh and a minor ninth. Start at the root G and stack the intervals to get the whole chord: G, B, D, F and A♭. The same formula gives you the chord in any other key.

Dominant seventh flat nine chords are the classic altered dominant of bebop and gospel, most often the V7 of a ii-V-i in a minor key. Gospel piano voices this chord thick under the vocal line right before it resolves.

How G7♭9 differs from similar chords

G7♭9 is G7 with a minor ninth, a half step above the root, where G9 has a major ninth. Leave out the root and the other four notes form a diminished seventh chord a major third up. That is why it pulls so hard towards a minor chord a fifth below.

Where G7♭9 is used

A dominant chord wants to resolve. Its home is the V of a major key - and the I of a blues, where the pull never lets up.

As the VC major
  1. ii7Dm7
  2. V7♭9G7♭9
  3. Imaj7Cmaj7

G7♭9 is the chord that wants to resolve, so ending the loop on it hands straight back to the top.

Questions people ask

What notes are in the G7♭9 chord?
The G7♭9 chord contains G, B, D, F and A♭ (G, B, D, F and Ab in plain text).
Is the G7♭9 chord major or minor?
G7♭9 is a altered dominant seventh chord. Dominant seventh flat nine chords sound dark and urgent. Stacking a minor ninth on a dominant seventh tightens the tension already built into the tritone, which makes the chord a strong pull toward a minor tonic.
How do you play G7♭9 on piano?
Place your fingers on G, B, D, F and A♭ and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard A♭ is a black key and G, B, D and F are white.
How do you play G7♭9 on guitar?
Use the fingering in the diagram above. The fretted notes sit between frets 1 and 3. Strings 4 and 2 ring open.
What chords work well with G7♭9?
G7♭9 pairs naturally with the chords in the related section: a perfect fifth up or down, the relative major or minor, and anything sharing two notes with it.