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

AbM7b5, AbMa7b5, Abj7b5, AbΔ7b5, AbΔb5, Ab maj7b5
Notes: A♭, C, E♭♭, G
10,9,0,0 (21..)
10,7,7,7 (2111)