A9 chord on 8-String Guitar – Half Step Down
in Half Step Down (F-A#-D#-G#-C#-F#-A#-D#) tuning
A9
Dominant 9
Notes:A · C# · E · G · B
Piano Left hand Right hand
Fingerings (16)
A9 shapes as text
| Shape | Frets | Fingers | Notes | Difficulty |
|---|---|---|---|---|
| x x x 1 0 1 1 1 | – – – 1 – 2 3 4 | x x x A C# G B E | medium | |
| 2 3 6 3 x x x x | 1 2 4 3 – – – – | G C# A B x x x x | hard | |
| 4 3 4 3 3 3 3 4 | 2 1 3 1 1 1 1 4 | A C# G B E A C# G | medium · barre on fret 3 | |
| 4 6 4 5 0 5 x x | 1 4 1 2 – 3 – – | A E G C# C# B x x | medium · barre on fret 4 | |
| x x 6 5 6 5 6 x | – – 2 1 3 1 4 – | x x A C# G B E x | medium · barre on fret 5 | |
| x x 6 8 6 7 6 8 | – – 1 3 1 2 1 4 | x x A E G C# E B | medium · barre on fret 6 | |
| x x x x 8 7 9 8 | – – – – 2 1 4 3 | x x x x A C# G B | medium | |
| x 11 8 8 8 x 9 10 | – 4 1 1 1 – 2 3 | x A B E A x G C# | hard · barre on fret 8 | |
| x 11 10 x 10 x 9 x | – 4 2 – 3 – 1 – | x A C# x B x G x | hard | |
| x 11 10 11 10 10 11 10 | – 2 1 3 1 1 4 1 | x A C# G B E A C# | medium · barre on fret 10 | |
| 4 1 1 1 3 1 3 1 | 4 1 1 1 2 1 3 1 | A B E A E G C# E | medium · barre on fret 1 | |
| 2 3 x 3 x 3 x x | 1 2 – 3 – 4 – – | G C# x B x A x x | hard | |
| 4 3 4 3 3 3 3 x | 2 1 3 1 1 1 1 – | A C# G B E A C# x | easy · barre on fret 3 | |
| 4 6 4 x 0 5 6 x | 1 3 1 – – 2 4 – | A E G x C# B E x | hard · barre on fret 4 | |
| x x 6 5 6 5 x x | – – 2 1 3 1 – – | x x A C# G B x x | easy · barre on fret 5 | |
| x x 6 8 6 7 x 8 | – – 1 3 1 2 – 4 | x x A E G C# x B | hard · barre on fret 6 |
The A9 chord (Dominant 9) is built from the notes A, C#, E, G, B. Below are playable fingerings for 8-String Guitar – Half Step Down generated for your selected tuning, ordered from open-position shapes up the neck. Tap a diagram to hear it, or switch to the piano view to see the same harmony on keys.
How the A9 chord is built
Formula: 1 · 3 · 5 · ♭7 · 9
| Degree | Semitones | Note |
|---|---|---|
| 1 | 0 | A |
| 3 | 4 | C# |
| 5 | 7 | E |
| ♭7 | 10 | G |
| 9 | 14 | B |
More A chords
Other roots
See A9 in another tuning
What notes make up the A9 chord?
A9 is a Dominant 9 chord built from the notes A, C#, E, G, B.
How do I read the diagram?
Strings run left to right from the lowest to the first string; the numbers show which finger presses each fret. An ○ marks an open string, an ✕ marks a muted one.