What we have to ask ourselves is why are the students quitting your program but not the others. Yes kids will say it is because band takes too much time but after you look at it realistically 95% of the time that is never the truth.
You have to really look and see what the real reason is. Most people do not want to do that because that would be harder then just blaming the system and other programs for why we are struggling.
Once you figure out the true reason you and your program are struggling, you and your program will become better.