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Chord chart for A augmented 7th flat 9th / C♯ (1st inversion) Guitar Chord: Notes, Shapes & Bass Note | Guitar Wiz

Aaug7♭9/C♯ guitar shapes

Popular fretboard positions with fingering suggestions

Showing 8 of 10 playable shapes

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A augmented 7th flat 9th / C♯ (1st inversion) guitar chord diagram showing fretboard positions

About the chord

A augmented 7th flat 9th / C♯ (1st inversion)

Aaug7♭9/C♯ is the A augmented 7th flat 9th / C♯ (1st inversion) guitar chord with C♯ 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 C♯ in the bass, this voicing functions as the 1st inversion of A augmented 7th flat 9th.

Also written as Aaug7♭9, A7♯5♭9/C♯, A+7♭9/C♯, and A7+5♭9/C♯.

Root note: A
Bass note: C♯
Chord tones: 5
Playable shapes: 10

Chord tones

AC♯E♯GB♭

Common guitar voicings

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

Shape x47066

x47066

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

Shape 987066

987066

View shape
  1. 1 Place the 1st finger on the 6th fret of the 1st string and 2nd string in barre position.
  2. 2 Place the 2nd finger on the 7th fret of the 4th string.
  3. 3 Place the 3rd finger on the 8th fret of the 5th string.
  4. 4 Place the 4th finger on the 9th fret of the 6th string.
  5. 5 Let the third string ring open.
  6. 6 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.

Shape details

Every shape is shown with its diagram and exact fingering instructions.

Aaug7♭9/C♯ shape x47066

How to play this shape

  1. 1 Place the 1st finger on the 4th fret of the 5th string
  2. 2 Place the 3rd finger on the 6th fret of the 1st string and 2nd string in barre position
  3. 3 Place the 4th finger on the 7th fret of the 4th string
  4. 4 Let the third string ring open
  5. 5 Do not play the sixth string
  6. 6 Strum from the fifth string down to the first string

Aaug7♭9/C♯ shape 987066

How to play this shape

  1. 1 Place the 1st finger on the 6th fret of the 1st string and 2nd string in barre position
  2. 2 Place the 2nd finger on the 7th fret of the 4th string
  3. 3 Place the 3rd finger on the 8th fret of the 5th string
  4. 4 Place the 4th finger on the 9th fret of the 6th string
  5. 5 Let the third string ring open
  6. 6 Strum from the sixth string down to the first string

Aaug7♭9/C♯ shape 908066

How to play this shape

  1. 1 Place the 1st finger on the 6th fret of the 2nd string
  2. 2 Place the 2nd finger on the 6th fret of the 1st string
  3. 3 Place the 3rd finger on the 8th fret of the 4th string
  4. 4 Place the 4th finger on the 9th fret of the 6th string
  5. 5 Let the fifth and third strings ring open
  6. 6 Strum from the sixth string down to the first string

Aaug7♭9/C♯ shape 908069

How to play this shape

  1. 1 Place the 1st finger on the 6th fret of the 2nd string
  2. 2 Place the 2nd finger on the 8th fret of the 4th string
  3. 3 Place the 3rd finger on the 9th fret of the 6th string
  4. 4 Place the 4th finger on the 9th fret of the 1st string
  5. 5 Let the fifth and third strings ring open
  6. 6 Strum from the sixth string down to the first string

Aaug7♭9/C♯ shape 908a8x

How to play this shape

  1. 1 Place the 1st finger on the 8th fret of the 4th string
  2. 2 Place the 2nd finger on the 8th fret of the 2nd string
  3. 3 Place the 3rd finger on the 9th fret of the 6th string
  4. 4 Place the 4th finger on the 10th fret of the 3rd string
  5. 5 Let the fifth string ring open
  6. 6 Do not play the first string
  7. 7 Strum from the sixth string down to the second string

Aaug7♭9/C♯ shape 9880ax

How to play this shape

  1. 1 Place the 1st finger on the 8th fret of the 5th string
  2. 2 Place the 2nd finger on the 8th fret of the 4th string
  3. 3 Place the 3rd finger on the 9th fret of the 6th string
  4. 4 Place the 4th finger on the 10th fret of the 2nd string
  5. 5 Let the third string ring open
  6. 6 Do not play the first string
  7. 7 Strum from the sixth string down to the second string

Aaug7♭9/C♯ shape 9a8aax

How to play this shape

  1. 1 Place the 1st finger on the 8th fret of the 4th string
  2. 2 Place the 2nd finger on the 9th fret of the 6th string
  3. 3 Place the 3rd finger on the 10th fret of the 5th string
  4. 4 Place the 4th finger on the 10th fret of the 2nd string and 3rd string in barre position
  5. 5 Do not play the first string
  6. 6 Strum from the sixth string down to the second string

Aaug7♭9/C♯ shape 90806x

How to play this shape

  1. 1 Place the 1st finger on the 6th fret of the 2nd string
  2. 2 Place the 3rd finger on the 8th fret of the 4th string
  3. 3 Place the 4th finger on the 9th fret of the 6th string
  4. 4 Let the fifth and third strings ring open
  5. 5 Do not play the first string
  6. 6 Strum from the sixth string down to the second string

Quick answers

What notes are in Aaug7♭9/C♯?

Aaug7♭9/C♯ uses the notes A, C♯, E♯, G, and B♭. Its interval formula is 1-3-♯5-♭7-♭9.

What is another name for Aaug7♭9/C♯?

Aaug7♭9/C♯ is also written as Aaug7♭9, A7♯5♭9/C♯, A+7♭9/C♯, and A7+5♭9/C♯.

How do you play Aaug7♭9/C♯ on guitar?

Place the 1st finger on the 4th fret of the 5th string. Place the 3rd finger on the 6th fret of the 1st string and 2nd string in barre position. Place the 4th finger on the 7th fret of the 4th string. Let the third string ring open. Strum from the 5th string down.

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