Banjo A6 chord (Double C)A sixth on the 5-string banjo: 1 2 4 4, and 3 more shapes

Frets, string 4 to string 1: 1 2 4 4 (first position)

1. String 4 (C): 1st fret, index finger, C♯
2. String 3 (G): 2nd fret, middle finger, A
3. String 2 (C): 4th fret, ring finger, E
4. String 1 (D): 4th fret, little finger, F♯
5. String 5, the short g: open, G, not in the chord

Sounds: C♯ A E F♯  ·  A6 is A, C♯, E, F♯ (1 · 3 · 5 · 6)

The 5th string: the short g rubs against the F♯ in this shape, a semitone away: some players let it ring, some skip it.

Double C tuning: gCGCD, the short 5th string first, then strings 4 to 1.