What is the A# Phrygian Dominant Scale?
Phrygian dominant is the fifth mode of the harmonic minor scale, and it sounds like Phrygian mode but with a major 3rd instead of a minor 3rd. That combination of the exotic ♭2 with a bright major 3rd is the defining sound of flamenco, Middle Eastern music, and the V chord resolving to a minor tonic in classical harmony. Here's how the A# Phrygian Dominant Scale lays out on the fretboard. This scale is enharmonically equivalent to Bb Phrygian Dominant.
Notes and Positions
Spanish/Middle Eastern flavor; 5th mode of harmonic minor. On guitar, you can treat this as both a lead vocabulary and a way to see chord tones inside common shapes. Start with one box, then connect it to the nearest root on the next string set. In the key of A#, the notes are: A#, B, C##, D#, E#, F#, G#.
How to Use It
You'll often hear it in Flamenco, Metal, and Middle Eastern. A good way to internalize the sound is to sing the root, then sing a few scale degrees before you play them.
Practice in small fragments (3-4 notes) and connect them across adjacent positions. Use the interactive fretboard above to spot repeats of the same note on different strings and frets.