Drop C (gCGBD) Tuning
Tune your banjo to Drop C (gCGBD) — G4, C3, G3, B3, D4
About Drop C (gCGBD) Tuning
Drop C tuning (G4-C3-G3-B3-D4) takes Standard Open G and lowers only the 4th string from D to C. This simple change makes playing in the key of C much easier while keeping most of the familiar chord shapes from standard tuning intact. It's one of the most practical alternate tunings for expanding your repertoire without relearning the fretboard.
Drop C is widely used in both bluegrass and old-time styles when a song is in the key of C. Rather than using complex chord shapes to play C-based music in Open G, dropping the 4th string gives you an open C bass note that anchors the sound. Many players switch between Open G and Drop C multiple times during a performance.
The tuning is especially useful for songs that alternate between G and C chords. With the 4th string at C, the open strings approximate a C major chord (C-G-B-D), and the familiar G chord is still accessible with a simple shape on the lower strings.
String Notes
Recommended Strings
Standard strings handle Drop C perfectly. The 4th string only drops one whole step from D3 to C3, a modest tension reduction. No special string set is needed — this is one of the easiest alternate tunings to set up.
How to Tune to Drop C (gCGBD)
- 1.Start from Standard Open G (gDGBD). Only one string changes — the 4th string.
- 2.Lower the 4th string from D3 down to C3 (130.81 Hz). This is one whole step.
- 3.All other strings stay the same: 5th = G4, 3rd = G3, 2nd = B3, 1st = D4.
- 4.Verify by fretting the 4th string at the 2nd fret — it should match the open 3rd string (D3). Wait — actually that should match D3. Let me correct: the open 4th string (C3) fretted at the 7th fret should match the open 3rd string (G3).
- 5.Strum the open strings — you should hear something close to a C major chord with the drone G on top.
Common Chords in Drop C (gCGBD)
C Major (open)
The open strings approximate C major. The low C root gives the chord a full, grounded sound.
G Major
Familiar shapes from standard tuning still work on the upper strings, with the 4th string now providing C bass notes for G/C transitions.
F Major
The IV chord from C. More accessible in Drop C than in standard Open G.
Am
The vi chord in C major. Simple shapes work well against the open C bass note.