Ive been thinking bout askin how these work so I am glad you brought this up squeak!

hmm how do u play the bass in? I mean with an arranger u hit the chord and it can play the bass and it moves with the chord changes in the song...is it the same system??? is there a place to play the chord in on the drum box?? do u midi in a keyboard?? or do I have it all wrong hehe??

I guess I dont understand how these work...

Any help appreciated!