A Diminished 7th

Adim7

Extremely tense. Symmetrical — repeats every 3 semitones.

🔊 Listen

Piano Keyboard

CACAD#F#D#F#

Guitar Fretboard

●●EF#ACD#BCD#F#AGACD#F#DD#F#ACAACD#F#AEF#ACD#123456789101112

Intervals

IntervalSemitonesNote
R0A
m33C
TT6D♯ / E♭
M69F♯ / G♭

Diminished 7th Chord in All Keys