First, you must get the biggest string, one tone downer ------------------------------| ------------------------------| ------------------------------| ------------------------------| ------------------------------| this one ---> ------------------------------| ||----------------------------------------------------|| ||----------------------------------------------------|| ||----------------------------------------------------|| ||--9-12-0--12----9-12-0--12----9-12-0--12-6---6-5-4--|| ||--9-12-0--12----9-12-0--12----9-12-0--12-6---6-5-4--|| ||--9-12-0--12----9-12-0--12----9-12-0--12-6---6-5-4--|| If you want to play the bass tab just play the bottom string and make your own custom how you like it .