The A-flat diminished seventh chord (abbreviated "Abdim7 chord") is a four-note chord consisting of the notes A, C, E, and G. The chord is formed by adding a diminished seventh to a A-flat diminished chord.

Name
A-flat diminished seventh chord
Synonym
A-flat fully diminished chord
Notes
A C E G
Intervals
1 3 5 7
Chord symbol
Ao7
Alternative symbols
Adim7 Adim Ao
Type
Tetrad (four-note chord)

Abdim7 chord on piano

Abdim7 chord on guitar

Abdim7 chord on ukulele

Abdim7 chord on the staff