A6/9 Chord: Guitar, Piano and Notes

The A6/9 chord is a six-nine chord built on the root note A. Its notes are A, C♯, E, F♯ and B.

Transpose
Quality
Short answer

Six-nine chords sound bright and pleasantly unresolved. A major sixth and a ninth sit on the triad with no seventh at all, so the chord never pulls toward a resolution and can simply sit there, which is why bands often end a song on one.

Notes
A · C♯ · E · F♯ · B
Formula
1 · 3 · 5 · 6 · 9
Semitones
0 · 4 · 7 · 9 · 14
Note
A
Quality
Six-Nine
Symbol
A6/9

A6/9 on piano

5 notes
View:
Piano diagram of the A6/9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play A6/9 on piano, place your right hand with your thumb on A, index finger on C♯, middle finger on E, ring finger on F♯ and little finger on B. Press the keys together and listen for an even sound. Practice moving in and out of the chord slowly, then bring in a metronome.

  • A1
  • C♯3
  • E5
  • F♯6
  • B9

A6/9 on guitar

View:
Guitar chord diagram of the A6/9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, A6/9 is commonly played with the voicing shown above. Strum only the strings marked as active in the diagram.

A6/9 chord notes

DegreeIntervalSemitonesNoteHear
1Root0A
3Major third4C♯(C#)
5Perfect fifth7E
6Major sixth9F♯(F#)
9Major ninth14B

How to use the A6/9 chord

The A6/9 chord is built from a root, a major third, a perfect fifth, a major sixth and a major ninth. Start at the root A and stack the intervals to get the whole chord: A, C♯, E, F♯ and B. The same formula gives you the chord in any other key.

Six-nine chords are a favourite ending for jazz standards and pop ballads, taking the place of a plain major or major seventh chord as the final I. They also work as a colourful substitute for a major triad anywhere in a progression.

Where A6/9 is used

A major chord is at home as a tonic, and just as useful as the IV or the V of a neighbouring key. Each progression below is written in the key its numerals name.

As the tonic (I)A major
  1. I6/9A6/9
  2. VE
  3. viF♯m
  4. IVD

Home. The loop leaves A6/9 and keeps coming back to it.

As the IVE major
  1. IE
  2. IV6/9A6/9
  3. VB
  4. IE

A6/9 is the step away from home that makes the return feel like a return.

Questions people ask

What notes are in the A6/9 chord?
The A6/9 chord contains A, C♯, E, F♯ and B (A, C#, E, F# and B in plain text).
Is the A6/9 chord major or minor?
A6/9 is a six-nine chord. Six-nine chords sound bright and pleasantly unresolved. A major sixth and a ninth sit on the triad with no seventh at all, so the chord never pulls toward a resolution and can simply sit there, which is why bands often end a song on one.
How do you play A6/9 on piano?
Place your fingers on A, C♯, E, F♯ and B and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right.
How do you play A6/9 on guitar?
A6/9 is typically played with the fingering shown in the diagram above. If one of the chord tones lines up with an open string, an open position is worth trying too.
What chords work well with A6/9?
A6/9 pairs naturally with the chords in the related section: a perfect fifth up or down, the relative major or minor, and anything sharing two notes with it.