A# Phrygian Mode: Questions a Student Asks, Answered

A# Phrygian sounds like a door creaking open in a dark room: the melody leans on its home note, then a neighbor just one hair above it presses in, tense and close, and every phrase seems to want to sink back down. That shadowy, slightly exotic pull is the whole personality of this scale. Here are the questions students usually ask me when we first play it together, with honest answers.

What notes are in it, and why are some of them spelled so strangely?

The notes of A# Phrygian are A#, B, C#, D#, E#, F#, G#. Then the scale returns to A# an octave higher.

The first thing most people notice is E#. On a piano, you play that note with the white key most people call F. So why not just write F? Because a scale written properly uses each letter name, A through G, exactly once. We already have an F# in the scale, so the note below it has to borrow the letter E. Calling it F would leave us with two F's and no E, which makes the music much harder to read.

So relax: E# is not a trick or a typo. It sounds exactly like F. It's just wearing the name that keeps the scale tidy.

You might also see this scale written as Bb Phrygian. That version sounds identical, because A# and Bb are the same key on the piano. It simply uses six flats instead of six sharps. Musicians call two spellings of the same sound enharmonic.

How does the step pattern build it?

A half step is the smallest distance in Western music, like moving from one piano key to the very next one, black or white. A whole step is two half steps. Phrygian follows this pattern:

H - W - W - W - H - W - W

Starting on A#, a half step up lands on B. A whole step takes you to C#, another to D#, another to E#. Then a half step brings you to F#, and two more whole steps give you G# and finally A# again.

As a formula, that's 1, b2, b3, 4, 5, b6, b7. The little "b" marks show which notes are lowered compared with a major scale. Phrygian lowers four of them, which is why it sounds so much darker than a cheerful major scale.

Which note makes it sound Phrygian?

That second note, B. It sits only a half step above the root, A#. Musicians call it the flat 2nd. Most scales put a whole step there, so this cramped half step is what gives Phrygian its tension.

Try it on a keyboard: play A# (the black key just below B), then the white key B right next to it, then back to A#. Sing along if you can. That tiny rise and fall is the sound of flamenco guitar and the menace of a lot of heavy metal riffs. When you hear B resolving down onto A#, you're hearing the heart of the mode.

Wait, isn't this just F# major?

In a sense, yes. A# Phrygian uses exactly the same notes as F# major (F#, G#, A#, B, C#, D#, E#), so it shares that key's signature of six sharps. F# major is called its parent scale.

The difference is where home is. In F# major, everything settles on F#. In A# Phrygian, the music circles around A# and comes to rest there. Same notes, different center of gravity, completely different mood. It's like rearranging the furniture in a room so you face a new window.

What chords can I use?

Stack every other note of the scale and you get these triads (three-note chords), with four-note seventh chords in brackets:

• i: A#m (A#-C#-E#) [A#m7]
• bII: B (B-D#-F#) [Bmaj7]
• bIII: C# (C#-E#-G#) [C#7]
• iv: D#m (D#-F#-A#) [D#m7]
• v°: E#dim (E#-G#-B) [E#m7b5]
• bVI: F# (F#-A#-C#) [F#maj7]
• bvii: G#m (G#-B-D#) [G#m7]

The star here is B major, the bII chord. Rocking between A#m and B is the quickest way to make anyone hear Phrygian. For something with more drama, try a descending line: D#m - C# - B - A#m. Each chord steps down, and the last move, B to A#m, carries that signature half-step slide home.

How should a melody behave in it?

Phrygian melodies like to hover near the root and fall onto it. A phrase that climbs up through C# and D#, then tumbles back down through B to A#, sounds natural and a little ominous. Lingering on B before resolving builds suspense; landing on it at the end of a phrase leaves the listener hanging.

Singers will find the half step from B down to A# surprisingly expressive. Slow it down, lean on the B, and let it ache before it lets go.

Where do guitarists find it?

The root A# sits at the 6th fret of the low E string (and again at the 18th), and at the 1st fret of the A string (and the 13th). From the 6th-fret root, the B you need is just one fret higher at the 7th, so you can hammer that half step without moving your hand. Down at the 1st fret of the A string, the open strings won't help you much, but the B is right there at fret 2.

Something to try today

Hold an A#m chord on any instrument, or have a drone play A#. Over it, play or sing just three notes: A#, B, A#. Do it slowly, then add C# above and let the line fall back through B to A#. Once that small figure sounds dark and inevitable to you, switch the chord underneath to B major and notice how the same three notes suddenly feel restless.

For the bigger picture, read The Phrygian Mode.