Finger Positions

Root Note G

Name G diminished seventh over A

Intervals 1P-3m-5d-7d

Relative Minor Em

Notes A, G, Bb, Db, E

Aliases Gdim7, G°7, Go7

How to play the Gdim7/A Chord

The Gdim7/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 diminished seventh over A is built using the 1P, 3m, 5d, 7d intervals. In the key of G Major, this chord functions as the I chord.

Common Progressions

In music composition, the Gdim7/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

Diminished Ultralocrian Locrian 6 Dorian #4 Lydian Diminished Hungarian Major Lydian #9 Half-Whole Diminished Composite Blues Messiaen's Mode #7 Chromatic

* 11 scales found containing the notes A, G, Bb, Db, E.

Acoustic & Digital Analysis

Digital footprint of the Gdim7/A chord for MIDI programming and synthesizer sound design.

MIDI Numbers 69, 67, 70, 61, 64

Frequencies (Hz)

440, 391.99543598174927, 466.1637615180899, 277.1826309768721, 329.6275569128699