About the G flat 9b5 Pentatonic scale
G 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 G♭, A♭, A, C, and F♭. The formula is W H 1½ 4 semitones W.
G♭ 9b5 Pentatonic uses two black keys on the piano, G♭ and A♭.
Notes and intervals
| 1 | GbG♭ | Root |
|---|---|---|
| 2 | AbA♭ | Major 2nd |
| 3 | AA | Minor 3rd |
| 4 | CC | Diminished 5th |
| 5 | FbF♭ | 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