Abm13

General info

Full name

Ab Minor 13

Symbol

Abm13

Root

Ab

Quality

Minor 13

Chord notes

Functions & resolutions

Typical function in key

VDominant (V)C# major

Stability / tension

Stable — can serve as major tonic

Most common resolutions

DbDb MajorEbEb MajorFmF Minor

Unstable degrees

4Db

b7Gb

resolves down to the resolution tonic

Main resolution

Abm13source

EbEb Major

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

Other resolutions

Abm13source

Deceptive resolution

FmF Minor

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

Abm13source

Modal resolution

GbGb Major

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

Abm13source

Jazz reharmonization

Abmaj7Ab 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).

Abm13source

Functional resolution

EbEb Major

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

Features

Character

Minor, with minor 7th, 9th and major 13th

Characteristic interval

Minor 3rd (m3), Minor 7th (b7), Major 13th (13)

Description

The m7 core preserves minor quality, while the major 13th emphasises natural scale degree 6. This combination has a particularly clear Dorian association.

Application

• Dorian harmony
• Minor tonic in jazz
• Neo-soul and fusion

Voicing & structure

Harmony

Compatible scales

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