Band directors are constantly asking their students to adjust their instruments on out of tune notes and unfortunately many students are unaware of the need. I will try to first identify the most difficult notes and suggest some exercises which will help students know exactly how much adjustment needs to be made. What notes are the most out of tune and why? All instruments with three valves face the same problem. Because of the length and acoustics of our instruments, there will be some notes or partials which will not be in tune. If you begin on the lowest open…