Bb Phrygian Mode
Bb–Cb–Db–Eb–F–Gb–Ab · root also written A#
Bb Phrygian is the 3rd mode of the F# major scale: Bb–Cb–Db–Eb–F–Gb–Ab. Its character: exotic, dark, and tense — the sound of flamenco and metal.
The flat 2nd is the defining interval. That half-step from root to ♭2 creates immediate tension and an unmistakably Spanish or Middle Eastern flavor. On guitar, target the flat 2nd (Cb) in your phrases — landing on it against the root is what makes a line sound Phrygian instead of plain minor.
Because every mode of F# major shares the same seven notes, any F# major fretboard shape works for Bb Phrygian — what changes is the note you resolve to. Loop a Bbm vamp or a backing track that stays on Bb, keep resolving your phrases to Bb, and the Phrygian color comes through. You'll hear this sound in metal and classical.
Bb Phrygian is mode 3 of F# Major — same seven notes, resolved to Bb instead.
Bb Phrygian on the Fretboard
Standard tuning, frets 0–12. Every dot is a note in the mode — blue dots are the root (Bb).
Notes and Intervals
| Interval | R | ♭2 | ♭3 | 4 | 5 | ♭6 | ♭7 |
|---|---|---|---|---|---|---|---|
| Note | Bb | Cb | Db | Eb | F | Gb | Ab |
The highlighted Cb is the flat 2nd — the note that gives Phrygian its sound.
Phrygian vs. Natural Minor
Everything else about the two scales is identical — these are the only degrees that change.
| Bb natural minor | Bb Phrygian | Note |
|---|---|---|
| 2 | ♭2 | Cb |
Chords in Bb Phrygian
The seven chords of F# Major, reordered to start from Bb — vamping between the first two or three keeps the Phrygian sound from collapsing back into the parent key.
Songs That Use the Phrygian Sound
Metallica — “Wherever I May Roam”
In E Phrygian. The sitar-like intro and main riff emphasize the F natural (♭2) against the E root, creating the exotic, dark atmosphere.
Paco de Lucía — “Entre dos Aguas”
A Phrygian masterpiece. The entire piece revolves around the characteristic ♭2 (B♭ over A), the defining sound of flamenco guitar.
Joe Satriani — “War”
Uses E Phrygian throughout. The riff hammers the F natural (♭2) against the open E string for maximum tension.
Bb Phrygian Mode FAQ
What is the Bb Phrygian mode?
Bb Phrygian is the 3rd mode of the F# major scale — the same seven notes starting from Bb: Bb–Cb–Db–Eb–F–Gb–Ab. The interval formula is R–♭2–♭3–4–5–♭6–♭7.
What is the difference between Bb Phrygian and Bb natural minor?
One note: where Bb natural minor has 2, Bb Phrygian has ♭2 (Cb). That single half-step is the entire difference in sound — everything else about the two scales is identical.
What chords work with Bb Phrygian?
The seven chords of the parent F# major scale, reordered to start from Bb: Bbm (i), B (♭II), Db (♭III), Ebm (iv), F° (v°), F# (♭VI), Abm (♭vii). A two-chord vamp between Bbm and B is the classic way to establish the Phrygian sound without drifting back to the parent key.
What major scale has the same notes as Bb Phrygian?
F# major. Bb Phrygian uses exactly the notes of F# major starting from its 3rd degree, so every F# major shape on the fretboard doubles as a Bb Phrygian shape. The same notes also spell F# Ionian, Ab Dorian, B Lydian, Db Mixolydian, Eb Aeolian, and F Locrian.
How do I practice the Bb Phrygian mode?
Modes live and die by harmonic context — run over a static Bbm vamp or a drone on Bb, not a full progression that pulls back to the parent key. Play the F# major shapes you already know, resolve every phrase to Bb, and lean on the flat 2nd (Cb). OpenFret's free Studio has a fretboard viewer and metronome for exactly this, and Guitar Quest turns scale practice into a game with real-time pitch detection.
Modes Sharing These Notes
All seven modes of F# Major use the same seven notes — each one treats a different note as home.
Related Modes
Practice Bb Phrygian with real feedback
Guitar Quest listens to your real guitar and turns scale practice into a game — run modes to battle monsters, with every note checked by pitch detection. Free in your browser, no signup needed.