Old thread, but I especially liked this comment from the eminently quotable R. I don't have a dog in this race - I have never done lip or mouthpiece buzzing nor ever thought about whether I buzz or not - I just blow and some sounds come out. But the other day I was driving home and started to lip-buzz some stuff in the car. (Something I don't do normally.) When I got home and took out my trumpet and found I couldn't play very well. I figure I over-did it.