Finger Positions

Abadd9 diagram
Root Note Ab
Name Ab
Intervals 1P-3M-5P-9M
Relative Minor Fm
Notes Ab, C, Eb, Bb
Aliases AbMadd9, Ab2, Abadd9, Abadd2

How to play the Abadd9 Chord

The Abadd9 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 is built using the 1P, 3M, 5P, 9M intervals. In the key of Ab Major, this chord functions as the I chord.

Common Progressions

In music composition, the Abadd9 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
Major Pentatonic Major Major Blues Bebop Lydian Mixolydian Flat Six Pentatonic Mixolydian B6 Lydian Dominant Lydian Minor Harmonic Major Bebop Minor Bebop Major Ichikosucho Composite Blues

* 15 scales found containing the notes Ab, C, Eb, Bb.

Acoustic & Digital Analysis

Digital footprint of the Abadd9 chord for MIDI programming and synthesizer sound design.

MIDI Numbers 68, 60, 63, 70
Frequencies (Hz)

415.3046975799451, 261.6255653005986, 311.1269837220809, 466.1637615180899