A Locrian Guitar Scale
Guitar scale in Open C tuning — fretboard diagram
A Locrian in Open C — Notes and Intervals
The A Locrian scale is the seventh and most unstable mode of the major scale. On Guitar, the notes are A, Bb, C, D, Eb, F, G. It sounds highly dissonant and unresolved, as its home chord is a diminished triad. While rare as a primary key, it is a crucial technical tool for jazz musicians improvising over half-diminished chords in tension-heavy passages. The diatonic chords of A Locrian are Am7b5, BbMaj7, Cm7, Dm7, EbMaj7, F7, Gm7. Commonly used in Jazz, Metal, Experimental, Avant-Garde. Notable players include John Coltrane, Meshuggah, Dream Theater. Use over m7b5 (half-diminished) chords. Essential for jazz ii-V-i in minor keys where the ii chord is half-diminished.
Notes: A, Bb, C, D, Eb, F, G
Intervals: 1P, 2m, 3m, 4P, 5d, 6m, 7m
Degrees: 1 b2 b3 4 5 b6 b7
Formula: H-W-W-H-W-W-W
Number of notes: 7
Tuning: Open C (C-G-C-G-C-E)
Diatonic Chords
Am7♭5 — B♭Maj7 — Cm7 — Dm7 — E♭Maj7 — F7 — Gm7
About Open C Tuning
Open C tuning (C-G-C-G-C-E) produces a C major chord when strummed open, with an enormous bass depth from the low C string (two whole steps below standard E). The tuning spans a vast tonal range that gives compositions an almost orchestral scope, making it a favorite for both delicate fingerstyle and crushing heavy music.
John Butler's 'Ocean' — one of the most famous modern fingerstyle compositions — is performed in Open C, showcasing the tuning's incredible dynamic range from thundering bass to shimmering harmonics. Devin Townsend uses Open C extensively across his catalog for its massive, wall-of-sound potential. Jimmy Page used it on Led Zeppelin's 'Friends' from Led Zeppelin III. Soundgarden also explored Open C. The three C strings and two G strings create powerful octave resonances that make even simple chord shapes sound huge.
Notable artists: John Butler, Devin Townsend, Jimmy Page (Led Zeppelin), Soundgarden, William Ackerman
Best for: Cinematic fingerstyle compositions, progressive metal walls of sound, post-rock textures, and any music that needs enormous tonal range from deep bass to bright treble
Musical Character
The only mode with a diminished 5th (b5) from the root, making its home chord a diminished triad. This instability means Locrian is almost never used as a key center — it is a tool for tension.
Explore This Scale in Other Tunings
- A Locrian in Standard Tuning
- A Locrian in Drop D
- A Locrian in DADGAD
- A Locrian in Open G
- A Locrian in Baritone (B Standard)
- A Locrian in 7-string
- A Locrian in 8-string
- A Locrian in Drop C
- A Locrian in Drop B
- A Locrian in Open D
- A Locrian in Half Step Down
- A Locrian in Open E
- A Locrian in Open A
- A Locrian in Double Drop D