C Ultralocrian Guitar Scale
Guitar scale in DADGAD tuning — fretboard diagram
C Ultralocrian in DADGAD — Notes and Intervals
The C Ultralocrian scale is an extremely dark and condensed scale used to create intense chromatic tension. On Guitar, its notes are C, Db, Eb, E, Gb, Ab, A. It is used in avant-garde jazz and dark ambient music to explore the most dissonant boundaries of minor-key tonality. Commonly used in Avant-Garde, Dark Ambient, Experimental Jazz. Notable players include John Zorn, Derek Bailey. Use over dim7 chords in avant-garde contexts. More of a compositional tool than an improvisational one.
Notes: C, Db, Eb, E, Gb, Ab, A
Intervals: 1P, 2m, 3m, 4d, 5d, 6m, 7d
Degrees: 1 b2 b3 4 5 b6 7
Formula: H-W-H-W-W-H-WH
Number of notes: 7
Tuning: DADGAD (D-A-D-G-A-D)
Also known as: superlocrian bb7, superlocrian diminished
About DADGAD Tuning
DADGAD tuning creates an open Dsus4 chord when strummed open, producing a hauntingly beautiful, droning sound that has become synonymous with Celtic folk music and modern acoustic songwriting. The tuning's natural resonance and overtones make even simple fingerpicking patterns sound rich and complex.
Popularized by Davey Graham in the 1960s and later championed by Pierre Bensusan and Jimmy Page, DADGAD has become one of the most beloved alternate tunings for acoustic guitarists. Its suspended quality — neither clearly major nor minor — creates an ethereal, meditative atmosphere that invites exploration. The tuning excels at creating drone-based arrangements where open strings ring against fretted notes.
Notable artists: Pierre Bensusan, Jimmy Page, Andy McKee, Davey Graham, Laurence Juber
Best for: Celtic folk, acoustic songwriting, drone-based fingerpicking, and meditative compositions
Musical Character
The darkest mode of the harmonic minor — so dark it has a diminished 4th (bb7), making it almost chromatic. Used to push dissonance to its absolute limit.