A°7 chord on 6-String Guitar – Open C

in Open C (C-G-C-G-C-E) tuning

Root

Type

Tuning

A°7

Diminished 7

Notes:A · C · D# · F#

mediumfret 2

Piano Left hand Right hand

Fingerings (16)

A°7 shapes as text

Frets	Fingers	Notes	Difficulty
x 2 0 2 3 2	– 1 – 2 4 3	x A C A D# F#	medium
x 2 3 5 3 2	– 1 2 4 3 1	x A D# C D# F#	medium · barre on fret 2
x x 3 5 6 5	– – 1 2 4 3	x x D# C F# A	medium
9 8 0 5 6 5	4 3 – 1 2 1	A D# C C F# A	hard · barre on fret 5
9 8 0 8 6 x	4 2 – 3 1 –	A D# C D# F# x	medium
9 11 0 8 9 8	2 4 – 1 3 1	A F# C D# A C	medium · barre on fret 8
9 11 9 11 0 11	1 2 1 3 – 4	A F# A F# C D#	medium · barre on fret 9
x 2 3 2 0 2	– 1 4 2 – 3	x A D# A C F#	medium
x 2 3 5 6 2	– 1 2 3 4 1	x A D# C F# F#	hard · barre on fret 2
x x 6 5 3 5	– – 4 2 1 3	x x F# C D# A	medium
9 5 0 8 6 x	4 1 – 3 2 –	A C C D# F# x	hard
9 8 6 8 0 x	4 2 1 3 – –	A D# F# D# C x	medium
9 11 0 8 12 8	2 3 – 1 4 1	A F# C D# C C	hard · barre on fret 8
9 11 0 11 0 11	1 2 – 3 – 4	A F# C F# C D#	medium
x 2 0 5 3 2	– 1 – 4 3 2	x A C C D# F#	medium
x 2 6 5 3 2	– 1 4 3 2 1	x A F# C D# F#	hard · barre on fret 2

Max fret: 12

Fingerings shown: 16

The A°7 chord (Diminished 7) is built from the notes A, C, D#, F#. Below are playable fingerings for 6-String Guitar – Open C 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 A°7 chord is built

Formula: 1 · ♭3 · ♭5 · 6

Degree	Semitones	Note
1	0	A
♭3	3	C
♭5	6	D#
6	9	F#

More A chords

A Am A7 A°A+A9 Amaj7 Am7 A7♯5 A7♭5 A6 Am6 Am7♭5 Asus2 Asus4 Aadd9 Amaj9 Am9 A5

Other roots

C°7 C#°7 D°7 D#°7 E°7 F°7 F#°7 G°7 G#°7 A#°7 B°7

See A°7 in another tuning

Standard E E-A-D-G-B-E Half Step Down (Eb) D#-G#-C#-F#-A#-D#Drop D D-A-D-G-B-E Open C C-G-C-G-C-E Open D D-A-D-F#-A-D Open G D-G-D-G-B-D DADGAD (D Modal) D-A-D-G-A-D

What notes make up the A°7 chord?

A°7 is a Diminished 7 chord built from the notes A, C, D#, F#.

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.