Chords
Gb Dominant thirteenth
Gb · Bb · Db · Fb · Ab · Eb
The thirteenth chord — the full dominant stack. In practice, four well-chosen notes.
Gb Dominant thirteenth
Gb · Bb · Db · Fb · Ab · Eb
Voicings on the piano
| Voicing | Notes | Play it on your instrument |
|---|---|---|
| Closed, root position | Gb3 · Bb3 · Db4 · Fb4 · Ab4 · Eb5 | |
| Open (drop 2) | Gb3 · Ab3 · Bb3 · Db4 · Fb4 · Eb5 | |
| Shell | Gb3 · Bb3 · Fb4 | |
| Rootless | Bb3 · Fb4 · Ab4 · Eb5 |
Tap a key or a fret to hear it.
Anatomy
Gb Dominant thirteenth (Gb13) contains the notes Gb · Bb · Db · Fb · Ab · Eb, 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 thirteenth 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 thirteenth belongs to.
In which keys
Gb Dominant thirteenth 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 thirteenth 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 thirteenth chord
Names and symbols
Gb13 is the chord symbol for Gb Dominant thirteenth.
Gb Dominant thirteenth and F# Dominant thirteenth are the same sound spelled two ways; both have a page here, and each links to the other. F# Dominant thirteenth
How it is built
On Gb the complete chord is Gb · Bb · Db · Fb · Ab · Eb, stacking 1P · 3M · 5P · 7m · 9M · 13M. Seven notes is more than any keyboard voicing wants and more than most ensembles can state clearly.
How it is used
What players actually voice is root, third, seventh and thirteenth — the notes that carry the identity. The fifth goes first, the eleventh next, and the ninth is optional.
It is the standard big-band dominant: full, bright, and still resolving, because the tritone between third and seventh is untouched.
Learn this properly
Chapter 10: Chords: Triads and SeventhsCommon questions
- What notes are in Gb13?
- In full, Gb13 contains Gb · Bb · Db · Fb · Ab · Eb. Name any set of notes with the chord identifier.
- Do you play all seven notes of a 13 chord?
- Almost never. Root, third, seventh and thirteenth state the chord; the fifth and eleventh are normally omitted.
- How is a 13 chord different from a 6 chord?
- A 13 chord includes the seventh and is dominant in function. A 6 chord has no seventh and is stable.
- What notes are in the Gb Dominant thirteenth chord?
- The Gb Dominant thirteenth chord contains the notes Gb · Bb · Db · Fb · Ab · Eb: the root Gb with the intervals 1P, 3M, 5P, 7m, 9M, 13M 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 thirteenth chord?
- Measured from Gb, the Gb Dominant thirteenth chord stacks the intervals 1P, 3M, 5P, 7m, 9M, 13M. 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.