Gb13b9

General info

Full name

G b13b9

Symbol

Gb13b9

Root

G

Quality

b13b9

Chord notes

Functions & resolutions

Stability / tension

Stable — can serve as major tonic

Most common resolutions

CC MajorDD MajorEmE Minor

Unstable degrees

4C

b7F

resolves down to the resolution tonic

Main resolution

Gb13b9source

DD Major

Major chord G is a stable tonic. As tonic it doesn't require resolution, but in a progression context typically moves to IV or V.

Other resolutions

Gb13b9source

Deceptive resolution

EmE Minor

As the V degree, a major chord can defy expectations by moving to vi instead of I (deceptive cadence).

Gb13b9source

Modal resolution

FF Major

In modal context, a major chord can freely move to bVII, bIII, or bVI — characteristic of Mixolydian mode.

Gb13b9source

Jazz reharmonization

Gmaj7G Major 7

In jazz, a major chord is enriched to maj7, 6/9, or add9 and can smoothly transition into a ii-V of another key (modulation).

Gb13b9source

Functional resolution

DD Major

As the IV degree (subdominant), a major chord can resolve to V or directly to I (plagal cadence).

Substitutions

Tritone substitution

C#7C# Dominant 7

Features

Character

Dominant, with b9 and b13

Characteristic interval

Minor 9th (b9), Minor 13th (b13)

Description

The minor 9th and minor 13th add two chromatically altered tones to a dominant seventh chord. Both commonly resolve by semitone, giving the chord sharp, directed tension.

Application

• Altered dominants in minor
• Jazz
• Harmonic minor

Voicing & structure

Harmony

Typical progressions

I-V-vi-IV

C—G—Am—F

Pop

Compatible scales

All chord tones are contained in these scales — use them for improvisation.