1           2           3           4          
           x x x x x x x x x x x x x x x x x x x x x x x x
                                                          
ride       X   X     x   x   X     X   X     x   x   X    
snare        x   x x   X   x   x x   x   x x   X   x   x x
bass       x   x                   x   x