How to Tune to 77377 (CGDFCG)
Labelled '77377' after its fret intervals, CGDFCG mixes stacked fifths with a suspended fourth for a bold, open drone that ranges from a low C to a high G. It gives dramatic, wide-interval voicings suited to modern, percussive fingerstyle and cinematic writing.
Start in standard tuning (E-A-D-G-B-E) and change 5 of 6 strings:
| String | Standard | Target | What to do |
|---|---|---|---|
| String 6 | E2 | C2 | Tune down 4 semitones |
| String 5 | A2 | G2 | Tune down a whole step |
| String 4 | D3 | D3 | Leave as is |
| String 3 | G3 | F3 | Tune down a whole step |
| String 2 | B3 | C4 | Tune up a half step |
| String 1 | E4 | G4 | Tune up 3 semitones |
String Tension & Setup Tips
Recommended Gauge:The low E drops to C and the A to G, needing heavier bottom strings, while the high E rises to G and wants a lighter top string. Tune up carefully to avoid breaking the raised strings.
Gear for 77377 (CGDFCG)
Tools that make tuning to C - G - D - F - C - G 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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Frequently Asked Questions
How do I tune to 77377 (CGDFCG)?
From standard tuning (EADGBE), retune each string low to high: 6th E→C, 5th A→G, 4th D (unchanged), 3rd G→F, 2nd B→C, 1st E→G. Match each string to its exact Hz using the interactive tuner above.
What does the 77377 tuning sound like?
Its stacked fifths plus a suspended fourth create a wide, dramatic drone spanning a low C to a high G, giving bold open voicings for modern fingerstyle.