Abadd9 Guitar Chord
Ab Add9 · also written G#add9 · Ab–C–Eb–Bb
Abadd9 is the Ab add9 chord: Ab–C–Eb–Bb. Its sound is colorful and modern — a plain triad sweetened with the 9th, all over 90s rock and acoustic pop. It's also written as G#add9 — same notes, same shapes, different spelling.
Unlike Ab9, Abadd9 skips the ♭7 and just stacks the 9th (Bb) on the plain triad — color without jazz function. It shines on acoustic guitar where the 9th can ring against open strings, and it's the secret behind countless 90s alt-rock and worship progressions in Ab and Eb.
The most common way to play Abadd9 is the neck voicing at the 3rd fret (4 3 x 3 4 x, low E string to high E string). Below you'll find 6 ways to play it across the neck, from open position to barre and shell voicings, with the theory behind the chord and the progressions it lives in.
How to Play Abadd9: 6 Voicings
Frets are listed from the low E string to the high E string. x = don't play that string, 0 = open string.
Abadd9 Chord Theory
| Interval | R | 3 | 5 | 9 |
|---|---|---|---|---|
| Note | Ab | C | Eb | Bb |
Abadd9 is built from the Ab major scale.
Abadd9 Chord FAQ
What notes are in the Abadd9 chord?
Abadd9 contains 4 notes: Ab (R), C (3), Eb (5), Bb (9). The interval formula for a add9 chord is R–3–5–9.
What is the easiest way to play Abadd9 on guitar?
Use the neck voicing at the 3rd fret: 4 3 x 3 4 x (frets listed from the low E string to the high E string, x = don't play that string). Abadd9 has no open-position shape in standard tuning, so this movable form is the standard starting point.
Is Abadd9 a major or minor chord?
Abadd9 is built on a major triad (Ab–C–Eb) with the 9 added, so it behaves as a major-family chord.
Is Abadd9 the same as G#add9?
Yes. Ab and G# are enharmonic equivalents — the same pitch written two ways. Abadd9 and G#add9 use identical shapes and frets; which spelling you see depends on the key of the song.
What keys use the Abadd9 chord?
Abadd9 appears diatonically in Ab major (as I), Eb major (as IV), and Db major (as V) — plus F minor, its relative minor key.
Related Chords
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