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Guitar scale · harmonic & melodic

A Phrygian b4 Scale

Mode 3 of Harmonic Major: Phrygian with a lowered 4th.

Notes ABbCDbEFG
Formula 1 ♭2 ♭3 ♭4 5 ♭6 ♭7
Steps H W H W+H H W W
Mood Dark, Tense, Unusual
Heard in Modal Improvisation

Interactive scale diagram

A Phrygian b4 Scale · Standard tuning

STR OP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 E A D G B E

Tap any note to hear it.

A Phrygian b4 Scale tab: all 5 positions

Each tab climbs from the low E string to the high e string. Play it up, then back down.

Position 1 · E shape frets 5–9
e|-----------------------------5-6-8-9-|
B|-------------------------6-8---------|
G|-------------------5-6-9-------------|
D|-------------5-7-8-------------------|
A|---------7-8-------------------------|
E|-5-6-8-9-----------------------------|
Position 2 · D shape frets 7–11
e|-----------------------------------8-9-|
B|---------------------------8-10-11-----|
G|----------------------9-10-------------|
D|------------7-8-10-11------------------|
A|-----7-8-10----------------------------|
E|-8-9-----------------------------------|
Position 3 · C shape frets 9–13
e|-----------------------------------------9-12-13-|
B|--------------------------------10-11-13---------|
G|------------------------9-10-12------------------|
D|------------------10-11--------------------------|
A|---------10-12-13--------------------------------|
E|-9-12-13-----------------------------------------|
Position 4 · A shape frets 12–16
e|-------------------------------------------12-13-15-|
B|-------------------------------------13-14----------|
G|----------------------------12-14-15----------------|
D|----------------------14-15-------------------------|
A|----------12-13-15-16-------------------------------|
E|-12-13-15-------------------------------------------|
Position 5 · G shape frets 14–18
e|-------------------------------------------15-17-18-|
B|-------------------------------------17-18----------|
G|-------------------------14-15-17-18----------------|
D|----------------14-15-17----------------------------|
A|----------15-16-------------------------------------|
E|-15-17-18-------------------------------------------|

How to play A Phrygian b4 on guitar

Find the root first: A is at fret 5 on the low E string and fret 0 on the A string. The blue notes on the diagram are every A on the neck; the gold ones are the rest of the scale's home chord (♭3, 5, ♭7), the safest notes to land on at the end of a phrase.

Learn it one box at a time. Position 1, the E shape, sits at frets 5–9. Once it's under your fingers, move to position 2 (the D shape) and play the notes the two boxes share, then keep going up the neck. After all five, the scale joins up into one pattern across the whole fretboard.

Degrees

DegreeNote
1 A
♭2 Bb
♭3 C
♭4 Db
5 E
♭6 F
♭7 G

Chords in A Phrygian b4

Stack every other note of the scale and you get these seven chords. They are the chords that sound "at home" in A Phrygian b4; tap one to see its shapes.

Degree Chord 7th chord Function
i Am Am7 Tonic
♭ii Bbm Bbm(maj7) Supertonic
♭III C C7 Mediant
♭IV+ Dbaug Dbmaj7#5 Subdominant
v° Edim Edim7 Dominant
♭VI F Fmaj7 Submediant
♭vii° Gdim Gm7b5 Leading tone / subtonic

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Questions

What notes are in the A Phrygian b4 Scale?
The A Phrygian b4 Scale has 7 notes: A, Bb, C, Db, E, F, G.
What chords are in the A Phrygian b4 Scale?
The chords of A Phrygian b4 are Am (i), Bbm (♭ii), C (♭III), Dbaug (♭IV+), Edim (v°), F (♭VI), Gdim (♭vii°).
What is the formula of the phrygian b4 scale?
1 ♭2 ♭3 ♭4 5 ♭6 ♭7, which is the step pattern H W H W+H H W W (W = whole step, H = half step).
Where do I play A Phrygian b4 on the guitar?
The root A is at fret 5 on the low E string and fret 0 on the A string. Position 1 (the E shape) covers frets 5–9, and four more positions connect it up the neck.

Phrygian b4 Scale in every key

More scales in A