Gbmaj13

General info

Full name

Gb Major 13

Symbol

Gbmaj13

Root

Gb

Quality

Major 13

Chord notes

Functions & resolutions

Typical function in key

IVSubdominant (IV)C# major

Stability / tension

Stable — can serve as major tonic

Most common resolutions

BB MajorDbDb MajorEbmEb Minor

Unstable degrees

7F

1Gb

resolves up to the root

Main resolution

Gbmaj13source

DbDb Major

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

Other resolutions

Gbmaj13source

Deceptive resolution

EbmEb Minor

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

Gbmaj13source

Modal resolution

EE Major

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

Gbmaj13source

Jazz reharmonization

Gbmaj7Gb 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).

Gbmaj13source

Functional resolution

DbDb Major

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

Features

Character

Major, with major 7th and 13th

Characteristic interval

Major 7th (M7), 13th

Description

The major 7th and 13th extend the major triad into a seven-note harmonic structure.

Application

• Final jazz cadences
• Orchestral arrangements
• Modern pop and neo-soul

Voicing & structure

Harmony

Compatible scales

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