How to Tune to Open C 7-String (GCGCGCE)
A seven-string open C tuning (G-C-G-C-G-C-E) that Devin Townsend uses to fuse extreme low-end heaviness with lush, chiming open chords. Adding a low G beneath a stacked open C major gives an enormous range — from subterranean chugs to shimmering high harmonics — perfect for his layered, ambient wall-of-sound productions.
Start in standard tuning (B-E-A-D-G-B-E) and change 5 of 7 strings:
| String | Standard | Target | What to do |
|---|---|---|---|
| String 7 | B1 | G1 | Tune down 4 semitones |
| String 6 | E2 | C2 | Tune down 4 semitones |
| String 5 | A2 | G2 | Tune down a whole step |
| String 4 | D3 | C3 | Tune down a whole step |
| String 3 | G3 | G3 | Leave as is |
| String 2 | B3 | C4 | Tune up a half step |
| String 1 | E4 | E4 | Leave as is |
Devin Townsend often designs custom tunings so that every open string reinforces a single chord, letting him layer dozens of guitar tracks that all ring in harmony. A seven-string open C like this gives him both the crushing low register of extended-range metal and the bell-like openness of an acoustic tuning.
String Tension & Setup Tips
Gear for Open C 7-String (GCGCGCE)
Tools that make tuning to G - C - G - C - G - C - E easier.
D'Addario Universal Micro Headstock Tuner
A headstock tuner makes switching in and out of this tuning quick, even on stage or without a mic.
D'Addario Pro-Winder (winder + cutter)
Retuning 5 strings means a lot of turning — a winder speeds it up and trims new strings too.
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