Adim7
Dim 7 · A – C – D♯ – F♯
- AR
- Cm3
- D♯♭5
- F♯6
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the Adim7 chord
The Adim7 chord (Dim 7) is built from A (the root), C (a minor third), D♯ (a diminished fifth) and F♯ (a major sixth). Diminished seventh chords are symmetrical and restless, handy for dramatic passing motion.