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Chord chart for A♭ augmented 7th flat 9th / B♭♭ (4th inversion) Guitar Chord: Notes, Shapes & Bass Note | Guitar Wiz

A♭aug7♭9/B♭♭ guitar shapes

Popular fretboard positions with fingering suggestions

Showing 8 of 13 playable shapes

A♭ augmented 7th flat 9th / B♭♭ (4th inversion) guitar chord diagram showing fretboard positions
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About the chord

A♭ augmented 7th flat 9th / B♭♭ (4th inversion)

A♭aug7♭9/B♭♭ is the A♭ augmented 7th flat 9th / B♭♭ (4th inversion) guitar chord with B♭♭ in the bass. It uses the notes A♭, C, E, G♭, and B♭♭ and the interval formula 1-3-♯5-♭7-♭9.

The A♭ augmented 7th flat 9th augmented 7th flat 9th chord blends the augmented triad with a minor seventh and flat ninth B♭♭, producing a complex, dramatic tension. Its dissonant, unresolved sound is ideal for jazz and film scoring. With B♭♭ in the bass, this voicing functions as the 4th inversion of A♭ augmented 7th flat 9th.

Also written as A♭aug7♭9, A♭7♯5♭9/B♭♭, A♭+7♭9/B♭♭, and A♭7+5♭9/B♭♭.

Root note: A♭
Bass note: B♭♭
Chord tones: 5
Playable shapes: 13

Chord tones

A♭CEG♭B♭♭

Common guitar voicings

These are quick-start shapes for players who want the answer first and the deeper theory second.

Shape 1

504554

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  1. 1 Place the 1st finger on the 4th fret of the 1st string and 4th string in barre position.
  2. 2 Place the 2nd finger on the 5th fret of the 6th string.
  3. 3 Place the 3rd finger on the 5th fret of the 3rd string.
  4. 4 Place the 4th finger on the 5th fret of the 2nd string.
  5. 5 Strum from the 6th string down.

Shape 2

576575

View shape
  1. 1 Place the 1st finger on the 5th fret of the 1st string, 3rd string, and 6th string in barre position.
  2. 2 Place the 2nd finger on the 6th fret of the 4th string.
  3. 3 Place the 3rd finger on the 7th fret of the 5th string.
  4. 4 Place the 4th finger on the 7th fret of the 2nd string.
  5. 5 Strum from the 6th string down.

Notes & Intervals

Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.

A♭ Unison (Root) 1

The root anchors the chord and defines its tonal center.

C Major Third 3

This note defines the chord's major quality and brings brightness to the sound.

E Augmented Fifth ♯5

The raised fifth adds lift, drama, and a more unsettled color.

G♭ Minor Seventh ♭7

The minor seventh adds bluesy or jazzy tension that wants to move onward.

B♭♭ Minor Ninth ♭9

The flat ninth adds sharper tension and a more dramatic clash.

Quick answers

What notes are in A♭aug7♭9/B♭♭?

A♭aug7♭9/B♭♭ uses the notes A♭, C, E, G♭, and B♭♭. Its interval formula is 1-3-♯5-♭7-♭9.

What is another name for A♭aug7♭9/B♭♭?

A♭aug7♭9/B♭♭ is also written as A♭aug7♭9, A♭7♯5♭9/B♭♭, A♭+7♭9/B♭♭, and A♭7+5♭9/B♭♭.

How do you play A♭aug7♭9/B♭♭ on guitar?

Place the 1st finger on the 4th fret of the 1st string and 4th string in barre position. Place the 2nd finger on the 5th fret of the 6th string. Place the 3rd finger on the 5th fret of the 3rd string. Place the 4th finger on the 5th fret of the 2nd string. Strum from the 6th string down.

Related Articles

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