I have recently discovered that some of the BRASS (pun) here on TM have a cool debate! Certainly I'm going to mention their names!.... I'll start with a Quote from the Embouchure Code thread. "Vulgano Brother, I still believe that the trumpet is essentially acoustically closed. The leakage of our air is only there to keep us from hyperventilating or suffocating. The mismatched horn design lets the internal resonance escape, giving our audiences something to listen to." Rowuk end quote ( what is latin for end quote? ) This kind debate reminds me of Richard Smith and his great experiment he documented in the Journal of the International Trumpet Guild, "EXCITING YOUR INSTRUMENT ! link: you'll find a pdf of the original, 1999, article there. ITG Web Site - Journal Index I played third trumpet next to Richard Smith for two years, just not the same Richard Smith. There are 36,734 Richard Smiths in North America alone; how do I know? WHO CARES! This Richard Smith publishing on the Trumpet Guild does not even play trumpet! This link is faster, a brief 2002 re-hash of the theory: ITG 2002 Dr. Richard Smith "Exciting Your Instrument" I love the theory. I love the debate. I think it's very interesting. So.... BRING IT!