About the A flat 9b5 Pentatonic scale
A flat 9b5 Pentatonic is used for jazz solos over altered and half-diminished chords. Think of it as a five-note scale with a minor third and a flat fifth.
Its notes are A♭, B♭, C♭, D, and G♭. The formula is W H 1½ 4 semitones W.
The black keys A♭, B♭, and G♭ belong to the key.
Notes and intervals
| 1 | AbA♭ | Root |
|---|---|---|
| 2 | BbB♭ | Major 2nd |
| 3 | CbC♭ | Minor 3rd |
| 4 | DD | Diminished 5th |
| 5 | GbG♭ | Minor 7th |
| Steps | W H 1½ 4 semitones W |
|---|---|
| Semitones | 2-1-3-4-2 |
| Degrees | 1 2 ♭3 ♭5 ♭7 |
Shapes
Chromatic
Circle of Fifths