I don't understand why, but when I try using air, and when I try playing a little loud(fortissimo) I drop notes. This seems very contradictory to people when they say, "Use more air to play high notes." When I try to use air, it never works. For example, a B flat above the staff (Not the C, a trumpets B Flat) I can play it better, quieter. But, when I go to a fortissimo, I drop it every time. Why is that? Any advice would be great.