Amaj9

General info

Full name

A Major 9

Symbol

Amaj9

Root

A

Quality

Major 9

Chord notes

Functions & resolutions

Typical function in key

IVSubdominant (IV)E major

Stability / tension

Stable — can serve as major tonic

Most common resolutions

DD MajorEE MajorF#mF# Minor

Unstable degrees

7G#

1A

resolves up to the root

Main resolution

Amaj9source

EE Major

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

Other resolutions

Amaj9source

Deceptive resolution

F#mF# Minor

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

Amaj9source

Modal resolution

GG Major

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

Amaj9source

Jazz reharmonization

Amaj7A 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).

Amaj9source

Functional resolution

EE Major

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

Features

Character

Major, with a major 7th and 9th

Characteristic interval

Major 7th (M7), 9th

Description

The major 7th creates semitone tension toward the octave, while the major 9th extends the major seventh chord. Separating extensions by register clarifies the structure.

Application

• Tonic Imaj9
• Neo-soul and jazz
• Sustained chordal textures

Voicing & structure

Harmony

Compatible scales

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