'Sync source' is half way down on the options menu. A fast way is to hold 'alt' and type 'o' then 'y', let up on 'alt' and type the down arrow to select 'midi clock', hit enter and RB should sync to your drum machine.

Edit: I just realized that I'm assuming again lol (I'm assuming you can run midi from your drum machine to your computer. ).

Last edited by jim111; 06/02/12 01:31 AM.