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.

F# Lydian Diminished Guitar Scale

Guitar scale in Open C tuning — fretboard diagram

Tuning

Frets

F# Lydian Diminished in Open C — Notes and Intervals

The F# Lydian Diminished scale is a synthetic scale that blends the ethereal brightness of Lydian with the tension of a minor third. On Guitar, it contains the notes F#, G#, A, C, C#, D#, F. It is used to create a mysterious, neo-classical atmosphere that feels both ancient and modern at the same time. Commonly used in Film Scores, Neo-Classical, Fusion. Notable players include Danny Elfman, Bela Bartok. Use over m(Maj7), mMaj7#11 chords. A specialized color for neo-classical and cinematic passages.

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

Intervals: 1P, 2M, 3m, 4A, 5P, 6M, 7M

Degrees: 1 2 b3 #4 5 6 7

Formula: W-H-WH-H-W-W-H

Number of notes: 7

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

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

MysteriousAncientNeo-ClassicalEthereal

Blends Lydian's ethereal #4 with a minor 3rd — creating an atmosphere that feels both ancient and modern, mysterious yet strangely familiar.

Explore This Scale in Other Tunings

← All Guitar scales in Open C tuning