A♭dim7
Dim 7 · A♭ – C♭ – D – F
- A♭R
- C♭m3
- D♭5
- F♭♭7
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the A♭dim7 chord
The A♭dim7 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.