Stevie Wonder - Black Man Bass Tab

This is the two bar riff that Stevie's left hand / Nathan Watts are playing:
It goes through the whole of the song.

   Bbm9           Gb6(Ab bass)      Emaj7(F# bass)  Gb6

  
G
        1 3                     
        r                       
  
D
                                
4       e                       
  
A
1 1 1 1     1 1                 
  4 1   s                       
  
E
                4 4 4 4 4 4 4 4 
      2 t                 1 4 5 

For ease of playing in the recorded key you might want to try the following
(i.e.: tune down a semitone)
   Bm9            G6(A bass)         Fmaj7(G bass)   G6

  
Gb
        2 4                     
0       r                       
  
Db
                                
  0     e                       
  
Ab
2 2 2 2     2 2 0 0 0 0 0 0 0 0 
    2   s                   0 1 
  
Eb
                                
      3 t                 2