My Guitar Notes

F# locrian scale

The seventh mode of the major scale: a minor scale with a flattened second and a flattened fifth. It is the only mode whose tonic triad is diminished, which is why it is rarely used as a key centre.

Root
F# (also written Gb)
Scale
Locrian
Type
mode, mode 7 of seven
Notes
F# G A B C D E
Notes in the scale
7
Degree formula
1 b2 b3 4 b5 b6 b7
Semitones from the root
0 1 3 5 6 8 10
Step pattern
H W W H W W W
Parent major scale
G major
Key signature of this root
F# major / D# minor · F# C# G# D# A# E#
Written use
Named 1 b2 b3 4 b5 b6 b7. Its tonic triad is diminished; it is the natural scale over a half-diminished chord.

Notes and degrees

Each degree of the scale, its note name in this key, and its distance from the root in semitones.

DegreeNoteSemitonesInterval from the root
1F#0Perfect unisontonic
b2G1Minor second
b3A3Minor third
4B5Perfect fourth
b5C6Tritone
b6D8Minor sixth
b7E10Minor seventh

Positions on the guitar

The five windows below are computed, not copied from a shape chart. The script locates the lowest occurrence of F# on each of the five upper strings within the first twelve frets and takes a five-fret window centred on it. Because a scale repeats every twelve frets, these five windows cover the whole neck; the same sequence returns an octave higher. The positions are numbered from the lowest fret upwards, so position 1 is always the window nearest the nut and position 5 the window nearest the twelfth fret.

Position 1

Root on the 6th string E2 at fret 2. 18 notes of the scale inside this window.

String01234
1st (highest) string E4EF#G
2nd string B3BCD
3rd string G3GAB
4th string D3DEF#
5th string A2ABC
6th string E2EF#G

Position 2

Root on the 4th string D3 at fret 4. 17 notes of the scale inside this window.

String23456
1st (highest) string E4F#GA
2nd string B3DE
3rd string G3ABC
4th string D3EF#G
5th string A2BCD
6th string E2F#GA

Position 3

Root on the 2nd string B3 at fret 7. 18 notes of the scale inside this window.

String56789
1st (highest) string E4ABC
2nd string B3EF#G
3rd string G3CDE
4th string D3GAB
5th string A2DEF#
6th string E2ABC

Position 4

Root on the 5th string A2 at fret 9. 18 notes of the scale inside this window.

String7891011
1st (highest) string E4BCD
2nd string B3F#GA
3rd string G3DEF#
4th string D3ABC
5th string A2EF#G
6th string E2BCD

Position 5

Root on the 3rd string G3 at fret 11. 16 notes of the scale inside this window.

String910111213
1st (highest) string E4DE
2nd string B3ABC
3rd string G3EF#G
4th string D3BCD
5th string A2F#GA
6th string E2DE

Read the grid as a chord diagram: the top row is the first string. Degrees appear in the notes and degrees table above; a filled cell is a note of the scale, and the shaded cell is the tonic.

Related keys and modes

Related