My Guitar Notes

C# 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
C# (also written Db)
Scale
Locrian
Type
mode, mode 7 of seven
Notes
C# D E F# G A B
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
D major
Key signature of this root
C# major / A# minor · F# C# G# D# A# E# B#
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
1C#0Perfect unisontonic
b2D1Minor second
b3E3Minor third
4F#5Perfect fourth
b5G6Tritone
b6A8Minor sixth
b7B10Minor seventh

Positions on the guitar

The five windows below are computed, not copied from a shape chart. The script locates the lowest occurrence of C# 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 2nd string B3 at fret 2. 18 notes of the scale inside this window.

String01234
1st (highest) string E4EF#G
2nd string B3BC#D
3rd string G3GAB
4th string D3DEF#
5th string A2ABC#
6th string E2EF#G

Position 2

Root on the 5th string A2 at fret 4. 18 notes of the scale inside this window.

String23456
1st (highest) string E4F#GA
2nd string B3C#DE
3rd string G3ABC#
4th string D3EF#G
5th string A2BC#D
6th string E2F#GA

Position 3

Root on the 3rd string G3 at fret 6. 16 notes of the scale inside this window.

String45678
1st (highest) string E4AB
2nd string B3EF#G
3rd string G3BC#D
4th string D3F#GA
5th string A2C#DE
6th string E2AB

Position 4

Root on the 6th string E2 at fret 9. 18 notes of the scale inside this window.

String7891011
1st (highest) string E4BC#D
2nd string B3F#GA
3rd string G3DEF#
4th string D3ABC#
5th string A2EF#G
6th string E2BC#D

Position 5

Root on the 4th string D3 at fret 11. 17 notes of the scale inside this window.

String910111213
1st (highest) string E4C#DE
2nd string B3AB
3rd string G3EF#G
4th string D3BC#D
5th string A2F#GA
6th string E2C#DE

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