About a month ago I was at a camp for drum corps and they had us do something I've never done before. They had us blow air through just our mouthpieces and stick our hand about a foot away from our mouthpiece. They then had us buzz different notes, starting on a simple 2nd line G. The goal was to keep the same amount of air pressure on your hand the higher you went. They told us if the higher you went the less air you felt, you are an average player. They said you should feel more air as you get higher, but for this to happen for me I have to blow an insane amount of air just for a G on top of the staff. Like, volume and air I've never had to use before and I've marched one year before. Does this mean I have been using too much face, and not air support? Also a friend of mine told me when I played my high C's they sounded thinner and weaker than my G on the staff. They were there and in tune, just thinner. Am I right to assume there's a connection between this and the paragraph above? What can I do to improve on this?