About the A sharp 9b5 Pentatonic scale
A sharp 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♯, E, and G♯. The formula is W H 1½ 4 semitones W.
A♯ 9b5 Pentatonic draws three black keys from the piano, A♯, C♯, and G♯.
Notes and intervals
| 1 | A#A♯ | Root |
|---|---|---|
| 2 | B#B♯ | Major 2nd |
| 3 | C#C♯ | Minor 3rd |
| 4 | EE | Diminished 5th |
| 5 | G#G♯ | 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