This is probably an outrageously straight forward question but I'm a bit of a d*ck when it comes to theory and i havent yet received an answer i'm happy with so i'll just ask it and face the consequences. I'm going to play tuba with an oompah band in germany next month. their bass parts are written in bass clef (which i am poor at reading). if i want to play the part on my double B - what do i have to do??