The Bb phrygian dominant / A# phrygian dominant scale has 7 notes: Bb, B, D, Eb, F, Gb and Ab. Its formula is 1 b2 3 4 5 b6 b7 and its steps, in tones, are ½ – 1½ – ½ – 1 – ½ – 1 – 1.
The phrygian dominant mode (the "flamenco scale") has an eastern color, with a minor second and a major third. Typical of flamenco and Middle Eastern music.
Bb phrygian dominant
Bb B D Eb F Gb Ab · 1 b2 3 4 5 b6 b7
Colored dots: notes of the scale, the root is the darkest.