Banjo E♭7 chord (Double C)E♭ seventh on the 5-string banjo: 1 3 1 1, and 6 more shapes

Frets, string 4 to string 1: 1 3 1 1 (first position) · 5th string completes it

1. String 4 (C): 1st fret, index finger (barre), D♭
2. String 3 (G): 3rd fret, ring finger, B♭
3. String 2 (C): 1st fret, index finger (barre), D♭
4. String 1 (D): 1st fret, index finger (barre), E♭
5. String 5, the short g: open, G, in the chord

Sounds: D♭ B♭ D♭ E♭  ·  E♭7 is E♭, G, B♭, D♭ (1 · 3 · 5 · ♭7)

The 5th string: the short g is the 3rd of E♭7, so let it ring.

With a capo: on the 1st fret it’s 2 2 0 4 (frets counted from the capo), an open D7 shape. Spike the 5th string at the 6th fret to keep it in tune with the capo.

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