Finger Positions

Root Note G

Name G dominant ninth over A

Intervals 1P-3M-5P-7m-9M

Relative Minor Em

Notes G, B, D, F, A

Aliases G9

How to play the G9/A Chord

The G9/A is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the G dominant ninth over A is built using the 1P, 3M, 5P, 7m, 9M intervals. In the key of G Major, this chord functions as the I chord.

Common Progressions

In music composition, the G9/A chord is often used to create tension or resolution.

I-V-vi-IV

G → D → Em → C

vi-IV-I-V

Em → C → G → D

The Diatonic Family

Understanding the "family" of chords that belong to G helps with transposition and ear training.

Triads

G Am Bm C D Em F#dim

7ths

Gmaj7 Am7 Bm7 Cmaj7 D7 Em7 F#m7b5

Scale Compatibility

View All Scales

Bebop Mixolydian Mixolydian B6 Lydian Dominant Lydian Minor Bebop Minor Composite Blues Messiaen's Mode #3 Chromatic

* 9 scales found containing the notes G, B, D, F, A.

Acoustic & Digital Analysis

Digital footprint of the G9/A chord for MIDI programming and synthesizer sound design.

MIDI Numbers 67, 71, 62, 65, 69

Frequencies (Hz)

391.99543598174927, 493.8833012561241, 293.6647679174076, 349.2282314330039, 440