Bill -- that's an excellent post!! I could never figure why others who play at my level could never hold a long tone out as long as I do. I would always do at least one during a warmup and the entire ensemble would turn and stare wondering when the heck I would run out of air. I guess that explains it. The odd thing is that on humid days or any time I am suffering a cold or allergies, I can't shake that "stale air" sensation; but in the winter time I'm usually fine, and that's often when my playing is at its best.... Again, great post. I appreciate the new information!