| Hmmm ... reading all this has made my brain get a little tired, however I really enjoy reading what Larry has to say.
I'm not sure that thinking about the diplacment of air in the horn is all that important. I do know that it takes vertually no air to make any particular note speek on a trumpet. Pop your hand on your mpc ... pedal C. And how much air did it take to produce that note?
Also ... I just got in from a gig. I have recently gone to a Reeves custom mpc ... ES cup, #30 bore hole (small!) 692s bb, #5 shank. For me this combination of variables makes the "mpc" the point of compression. "I" / my body doesn't have to make the compression as much now. I didn't get tired, notes from a low f# to a D above double C spoke very easily. The more I backed off, let the mpc & horn (custom Scodwell) do their job the easier a time I have.
And, yes resisitant & "tight" feels mean different things to me. I'm not sure about the physics of it, but I've played very large bore horns, or large bb's & felt a lot of resistance that I didn't like. I think it has someting to do with the amount of effort it takes to get the vibrations in the "resonating tube" to happen.
A tight horn to me, means the notes slot very close together, and allows me to "not" have to blow like hell to get the sound I want. Tight does "not" mean resistant ... where the term relates to the playing characteristics of a given trumpet. The more I back off the gas, the more open / efficient then horn / mpc combinatuion becomes.
MPM
__________________ "~iii<O"
Michael Manthey
Scodwell USA Trumpets
Bob Reeves Mpc's www.ultrapureoils.com
Maynard Ferguson BBN Band |