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A7#9 Guitar Chord

A7#9 guitar chord: see the fingering, compare positions, and hear it before you play.

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Shape 1/2
Chord shapes:(2 positions)
A7#9Guitar fingering diagram for A7#9Fret 45672134××STRING6ªA5ªC#4ªG3ªC2ª×1ª×
View HD sheet

What sets A7#9 apart

The notes of A7#9 are A, C#, E, G and B#. A is the root, C# the major third, E the fifth, G the minor seventh and B# the sharp ninth. Said aloud, its notes are A, C sharp, E, G and B sharp.

String by string, low to high, it plays A, C#, G and B#. This shape leaves out E, the fifth. It runs from A on string 6 up to B# on string 3.

A7#9 uses no barre and no open strings, so you can slide the shape up the neck without changing fingers. Strings 2 and 1 stay silent. Your hand covers two frets, from 4 to 5. There is one more position, starting at fret 11.

A7#9 and F#m have A and C# in common. Dbm shares one position with this shape.

The notes of A7#9 do not fit together in any major or natural minor scale.

Chord Progressions

Explore recommended harmonic circles on CifraLab:

01A A - F#m - Bm - E702C#m C#m - A - F#m - G#7
Music Theory & Formula

Component notes and harmonic structure (A7#9)

Formula: Seventh with Augmented Ninth (1 - 3 - 5 - ♭7 - ♯9)
Constituent chord intervals:

A 1C# 3E 5G ♭7B# ♯9

Root Bass (Fundamental String)6th String (Low E) • Fret 5 (A)

String Control (Muted & Active)4 / 6 • 2 X Muted

2 Fretboard Positions

Other fretboard positions for A7#9:

01

position 5

Standard Position
4 / 6 stringsRoot: 6th String (Low E)
String Control (Muted & Active):
Root
6th String (Low E)
Fret 5Finger 2
ADegree 1
5th String (A)
Fret 4Finger 1
C#Degree 3
4th String (D)
Fret 5Finger 3
GDegree ♭7
3rd String (G)
Fret 5Finger 4
C
2nd String (B)
×Muted
Do not play
1st String (High E)
×Muted
Do not play

Placement tip: Press: 6th String (Low E) at fret 5 with your Middle finger, 5th String (A) at fret 4 with your Index finger, 4th String (D) at fret 5 with your Ring finger, 3rd String (G) at fret 5 with your Pinky finger. Don't play: 2nd String (B), 1st String (High E).

02

position 12

Inversion
4 / 6 stringsRoot: 5th String (A)
String Control (Muted & Active):
6th String (Low E)
×Muted
Do not play
Root
5th String (A)
Fret 12Finger 2
ADegree 1
4th String (D)
Fret 11Finger 1
C#Degree 3
3rd String (G)
Fret 12Finger 3
GDegree ♭7
2nd String (B)
Fret 13Finger 4
C
1st String (High E)
×Muted
Do not play

Placement tip: Press: 5th String (A) at fret 12 with your Middle finger, 4th String (D) at fret 11 with your Index finger, 3rd String (G) at fret 12 with your Ring finger, 2nd String (B) at fret 13 with your Pinky finger. Don't play: 6th String (Low E), 1st String (High E).

Biomechanics & Posture

Ergonomic tips to play without tension or fatigue (A7#9)

Standard Position

The shape in numbers

ItemIn this chord
Frets4 to 5
Fretting fingers4
Opennone
Muted2nd and 1st

What every chord shares is in the fingering reading.

Transitions & Pivot Fingers

Most common chord transitions from A7#9

Listen: A7#9 → Dbm · E7 · D

  1. A7#9
  2. Dbm
  3. A7#9
  4. E7
  5. A7#9
  6. D
A7#9 → Dbm01
Pivot / Anchor Finger:1 shared position
Stay in place
  • string 5, fret 4
Move
  • string 4, fret 6
  • string 3, fret 6
  • string 2, fret 5
  • string 1, fret 4
A7#9 → E702
Pivot / Anchor Finger:Full shape change

No finger is shared: place the bass on string 5 first, then the rest of the shape.

Move
  • finger 2: string 5, fret 2
  • finger 1: string 3, fret 1
A7#9 → D03
Pivot / Anchor Finger:Full shape change

No finger is shared: place the bass on string 3 first, then the rest of the shape.

Move
  • finger 1: string 3, fret 2
  • finger 3: string 2, fret 3
  • finger 2: string 1, fret 2

A7#9 in every key

This chord type does not belong naturally to a major or minor scale: it is used as colour or passing tension.

Main shape at a glance

Difficulty
3/5
Highest fret
5
Frets the hand covers
2
Barre
No
Strings that ring
4/6
Fretting fingers
4

A7#9 on other instruments

PianoThe same notes on the keyboard.All togetherHear guitar, piano, bass and violin together.
Frequently asked questions

Frequently asked questions about the chord (A7#9)

The questions that come up most when playing this chord

Which strings are played and which are muted in the A7#9 chord?

To play the A7#9 chord on guitar, only 4 strings are played, from string 6 to string 3. Muted strings must be gently dampened with the fleshy side of a fretting finger to prevent dissonance.

What is the root bass note of the A7#9 chord and on which string is it located?

The primary bass note of the A7#9 chord is its root note: A. In standard guitar tuning (EADGBe), this bass note is located on string 6 at fret 5.

When strumming or fingerpicking, strike this string first.

What notes make up the A7#9 chord and what is its formula?

The A7#9 chord is constructed using the 1 - 3 - 5 - ♭7 - ♯9 formula (Seventh with Augmented Ninth). Its constituent pitches are A, C#, E, G, B#.

How do you prevent the A7#9 chord from buzzing or sounding muted?

To prevent the A7#9 chord from buzzing or sounding muted, press the strings using the tips of your fingers at a strict 90-degree hammer angle. Position each finger immediately behind the fret wire with your thumb centered behind the neck.

Study sheet · High resolution

Official A7#9 chord diagram

A7#9 guitar chord diagram with fingering for fingers 1 to 4
Download HD sheet

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Other chords in the A family:

Chord A Chord Ab Chord Am Chord A7 Chord Ab7 Chord Amaj7 Chord Abmaj7 Chord Am7