Finger Positions

Root Note Ab

Name Ab diminished seventh

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

Relative Minor Fm

Notes Ab, B, D, F

Aliases Abdim7, Ab°7, Abo7

How to play the Abdim7 Chord

The Abdim7 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 Ab diminished seventh is built using the 1P, 3m, 5d, 7d intervals. In the key of Ab Major, this chord functions as the I chord.

Common Progressions

In music composition, the Abdim7 chord is often used to create tension or resolution.

I-V-vi-IV

Ab → Eb → Fm → Db

vi-IV-I-V

Fm → Db → Ab → Eb

The Diatonic Family

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

Triads

Ab Bbm Cm Db Eb Fm Gdim

7ths

Abmaj7 Bbm7 Cm7 Dbmaj7 Eb7 Fm7 Gm7b5

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 Ab, B, D, F.

Acoustic & Digital Analysis

Digital footprint of the Abdim7 chord for MIDI programming and synthesizer sound design.

MIDI Numbers 68, 71, 62, 65

Frequencies (Hz)

415.3046975799451, 493.8833012561241, 293.6647679174076, 349.2282314330039