What is Open C tuning?

Open C tuning is C-G-C-G-C-E (low to high). Strumming all strings produces a C major chord. The low C string sits two whole steps below standard E, giving exceptional bass depth.

What scales work in Open C?

C major and C major pentatonic are the most natural choices. C Lydian adds a dreamy, cinematic quality. For heavier styles, C minor and C Phrygian deliver dark intensity.

Do I need heavier strings for Open C?

Yes, the low C string needs a heavier gauge to maintain proper tension — at least a .056 or .058 for the 6th string. A set of 12-56 or similar is recommended. Without heavier strings, the low C will sound muddy and floppy.

C Whole Tone Guitar Scale

Guitar scale in Open C tuning — fretboard diagram

Tuning

Frets

C Whole Tone in Open C — Notes and Intervals

The C Whole Tone scale, also known as Messiaen's Mode of Limited Transposition #1, is a perfectly symmetrical scale that lacks a tonal center, creating a sense of weightlessness and blur. On Guitar, it contains the notes C, D, E, F#, G#, A#. It divides the octave into six equal whole steps, meaning only two unique whole tone scales exist. Popularized by Claude Debussy and used extensively in film scores, it evokes impressionistic, dreamlike atmospheres where no single note feels like home. Use it over augmented triads and 7#5 chords for a floating, surreal effect. Commonly used in Impressionist, Film Scores, Jazz, Ambient, Experimental. Notable players include Claude Debussy, Thelonious Monk, Wayne Shorter, Joe Satriani. Use over augmented triads, 7#5 chords. Perfect for dream sequences, transitions, and any moment where tonality should dissolve.

Notes: C, D, E, F#, G#, A#

Intervals: 1P, 2M, 3M, 4A, 5A, 6A

Degrees: 1 2 3 #4 #5 #6

Formula: W-W-W-W-W-W

Number of notes: 6

Tuning: Open C (C-G-C-G-C-E)

Also known as: messiaen's mode #1

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.

Fingerstyle AcousticProgressive Rock/MetalPost-RockFolkExperimental

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

WeightlessDreamyBlurryFloatingSurreal

Divides the octave into 6 equal whole steps — no half steps means no tension, no resolution, no tonal center. Only 2 possible whole tone scales exist (starting on C or C#).

Chord Progressions Using This Scale

I – I+ – I6 – I7 (Ascending Augmented)Classical / Pop — Hopeful & Yearning

Explore This Scale in Other Tunings

← All Guitar scales in Open C tuning