About the A flat diminished seven flat nine chord
A flat diminished seven flat nine sits outside the plain diatonic set, so it is borrowed to add color and tension. Think of it as an A♭ diminished seventh flat nine chord.
Its notes are A♭, C♭, D, F, and A. The intervals are a minor third, a diminished fifth, a diminished seventh, and a minor ninth.
Also called G sharp diminished seven flat nine, which spells the same notes enharmonically. In shorthand it is commonly written Abdim7(b9).
Positions
No stored guitar shape for this voicing yet. Build it from A♭, C♭, D, F, A.
Notes and intervals
| 1 | A flat | Root |
|---|---|---|
| 2 | C flat | Minor 3rd |
| 3 | D | Diminished 5th |
| 4 | F | 7d |
| 5 | A | Minor 9th |
Shapes
Chromatic
Circle of Fifths
Other A flat chords
Simpler triads
Suspended
A flat suspended two chordA flat suspended four chordA flat seven suspended four chordA flat nine suspended four chordA flat thirteen suspended four chord
Sixths and sevenths
A flat six chordA flat minor six chordA flat minor flat six chordA flat seven chordA flat major seven chordA flat minor seven chordA flat minor seven flat five chordA flat diminished seven chordA flat minor major seven chordA flat major seven flat five chordA flat major seven sharp five chordA flat minor major seven flat five chord
Extensions
A flat nine chordA flat add nine chordA flat major nine chordA flat minor nine chordA flat eleven chordA flat thirteen chordA flat six nine chordA flat minor add nine chordA flat major eleven chordA flat major thirteen chordA flat minor eleven chordA flat minor thirteen chordA flat minor six nine chordA flat minor major nine chordA flat minor major eleven chord
Altered
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