Hey all, I was just practicing some excercises, when I noticed a wheezing sound when I play my trumpet, especially on the high notes. It seems that when I try to force this wheezing sound to come out, when I'm not playing on my trumpet, it never comes, but when I play it always seems to be there. I figure its my throat or vocal chords. They aren't opening enough and they seemed blocked. Is there any way to unblock them, or any excercises to try?