A# Phrygian Bass Scale
Bass scale — fretboard diagram
A# Phrygian Scale — Notes and Intervals
The A# Phrygian scale is the third mode of the major scale, defined by its immediate dark and tense character. On Bass, its notes are A#, B, C#, D#, F, F#, G#. It has a strong Spanish or ethnic flavor, making it the definitive sound of Flamenco. In modern contexts, it is widely used in heavy metal to create an aggressive, brooding atmosphere. The diatonic chords of A# Phrygian are A#m7, BMaj7, C#7, D#m7, Fm7b5, F#Maj7, G#m7. Commonly used in Flamenco, Metal, Djent, Middle Eastern. Notable players include Al Di Meola, Metallica, Meshuggah, Paco de Lucia. Use over sus(b9), m7 chords in Phrygian contexts. Often played over a droning root note or power chord. The b2 → 1 resolution is the mode's signature move.
Notes: A#, B, C#, D#, F, F#, G#
Intervals: 1P, 2m, 3m, 4P, 5P, 6m, 7m
Degrees: 1 b2 b3 4 5 b6 b7
Formula: H-W-W-W-H-W-W
Number of notes: 7
Diatonic Chords
A♯m7 — BMaj7 — C♯7 — D♯m7 — Fm7♭5 — F♯Maj7 — G♯m7
How to Play A# Phrygian on Bass
On bass, locate A# on the A string at fret 1. Use a one-finger-per-fret approach starting from the root and span two to three strings. Keep your fretting hand relaxed and practice shifting between positions cleanly.
The A# Phrygian scale contains 5 sharps (A#, C#, D#, F#, G#). Its relative major is C# major, which shares the same key signature.
Practice Routine
Practice the A# Phrygian scale by playing it ascending with one rhythmic feel (straight eighth notes) and descending with another (swing or triplets) at 80 BPM. This dual approach trains both technical accuracy and rhythmic versatility with the 7 notes of the scale.
Try these progressions with the A# Phrygian scale: A#m7 - D#m7 - Fm7b5 - A#m7 (I-IV-V-I) or A#m7 - BMaj7 - D#m7 - Fm7b5 for a more stepwise movement.
Bass Tips
On bass, use the A# Phrygian scale to build walking bass lines by targeting chord tones on strong beats and using scale tones as approach notes. This is the foundation of functional bass playing.
The A# Phrygian scale contains 7 notes (A#, B, C#, D#, F, F#, G#). Use the interactive fretboard above to explore this scale on Bass with different tunings and fret ranges.
CAGED Positions & Patterns for A# Phrygian
The A# Phrygian scale can be played in 5 CAGED positions across the fretboard, each based on an open chord shape (C, A, G, E, D). As a 7-note scale, it also lends itself to 3-notes-per-string (3NPS) patterns that facilitate legato playing and diagonal shifting. Use the pattern selector above to isolate each position.