Chords
Gb Dominant ninth
Gb · Bb · Db · Fb · Ab
The dominant ninth — a dominant seventh with a major ninth added. Fuller, and a shade less aggressive.
Gb Dominant ninth
Gb · Bb · Db · Fb · Ab
Voicings on the piano
| Voicing | Notes | Play it on your instrument |
|---|---|---|
| Closed, root position | Gb3 · Bb3 · Db4 · Fb4 · Ab4 | |
| Open (drop 2) | Fb3 · Gb3 · Bb3 · Db4 · Ab4 | |
| Shell | Gb3 · Bb3 · Fb4 | |
| Rootless | Bb3 · Fb4 · Ab4 |
Tap a key or a fret to hear it.
Anatomy
Gb Dominant ninth (Gb9) contains the notes Gb · Bb · Db · Fb · Ab, each with a role measured as an interval from the root.
Read on: how triads are built · seventh chords · extensions
Inversions
An inversion of Gb Dominant ninth puts a chord tone other than Gb in the bass; the name after the slash is that bass note.
Where it lives
The keys and the scales Gb Dominant ninth belongs to.
In which keys
Gb Dominant ninth is diatonic to 2 keys; the numeral is its degree and the label its harmonic function.
Extensions beyond the seventh count when every note sits in the key.
Scales that contain it
Gb Dominant ninth fits inside these scales, each built on Gb.
- Gb MixolydianGb · Ab · Bb · Cb · Db · Eb · Fb
- Gb Lydian DominantGb · Ab · Bb · C · Db · Eb · Fb
- Gb BebopGb · Ab · Bb · Cb · Db · Eb · Fb · F
Understanding the Gb Dominant ninth chord
Names and symbols
Gb9 is the chord symbol for Gb Dominant ninth.
add9, 9 and maj9 are three different chords. add9 adds a ninth to a plain triad with no seventh; 9 is a dominant seventh with a ninth; maj9 is a major seventh with a ninth.
Gb Dominant ninth and F# Dominant ninth are the same sound spelled two ways; both have a page here, and each links to the other. F# Dominant ninth
How it is built
On Gb it is Gb · Bb · Db · Fb · Ab, stacking 1P · 3M · 5P · 7m · 9M. The tritone that drives the dominant is still there; the ninth simply adds width above it.
How it is used
It is the standard funk and soul dominant — the James Brown chord, usually voiced without the root so the bass can own it. In a ii–V–I it makes the V richer without weakening the resolution.
Learn this properly
Chapter 10: Chords: Triads and SeventhsCommon questions
- What notes are in Gb9?
- Gb9 contains Gb · Bb · Db · Fb · Ab. Name any set of notes with the chord identifier.
- How is a 9 chord different from a 7?
- It adds the major ninth above the dominant seventh. The tritone and the resolution are unchanged; the chord is just wider.
- Do I need to play all five notes?
- No. The fifth is usually dropped first, and in a band the root as well — the third, seventh and ninth carry the sound.
- What notes are in the Gb Dominant ninth chord?
- The Gb Dominant ninth chord contains the notes Gb · Bb · Db · Fb · Ab: the root Gb with the intervals 1P, 3M, 5P, 7m, 9M stacked above it. Play them together for the chord or one after another for an arpeggio. The lowest note is normally Gb, but any chord tone can take the bass in an inversion.
- What intervals make up the Gb Dominant ninth chord?
- Measured from Gb, the Gb Dominant ninth chord stacks the intervals 1P, 3M, 5P, 7m, 9M. The quality of the third and of the seventh, if there is one, is what gives the chord its character; the rest of the notes colour it. Every interval in the formula links to its own page, with its sound.