Bass Chord Chart and Tabs in Standard Tuning

Dobm2, Dobmadd2, Dobmadd9
Notes: Do♭, Mi♭♭, Sol♭, Re♭
7,4,4,7 (2113)
7,9,0,6 (23.1)
7,5,4,6 (4213)
7,9,11,7 (1231)