4-String Banjo Chord Chart and Tabs in Whole Step Down Tuning

Sib6, SibM6, Sib maj6
Notes: Si♭, Ré, Fa, Sol
0,0,2,0 (..1.)
0,0,7,7 (..12)
0,9,5,0 (.21.)
0,9,7,10 (.213)