Mary Kate a.k.a. "Wyntona"
"If a composer could say what he had to say in words he wouldn't bother trying to say it in music."
Henderson State University
Showband of Arkansas
OK - this discussion has raised another question about the intervals. I found a chart on the internet which shows the note name, frequency, wavelength, etc. It is based on the A4=440hz spectrum. It shows that C4 has a frequency of 261.63 and a wavelength of 51.97 inches. I had read somewhere else (can't remember where) that a Bb trumpet has an overall tube length (open valves) of 52" (51.97?). Well, at first glance, it seems to make sense that C4, being the lowest harmonic would have a wavelength equal to the length of the tubing. But, since a Bb trumpet is playing 2 semitones below the concert pitch, that means it is not really playing the C4 note that matches the tubing length. It seems like I also read that a C trumpet has a tubing length of 48" but this does not match a concert C tone either (it matches C#). So now I am really confused. Anybody know what I'm missing?
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Selmer Invicta London ('56)
Olds Recording ('58, '59, '60)
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(+Eastman, Besson 609 , Conn Director, King Cleveland, Holton Collegiate, Blessing Accord,
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If you have ever blown a tone across the top of a beer bottle, you know that VOLUME has a lot to say about the resonant frequency of the instrument - drink more beer and the note gets lower. The rule is for cylinders, length is the primary consideration. For irregular shapes, volume. In a trumpet both.
The bell also behaves differently at high and low frequencies. Buy 5 feet of 1/2 garden or aquarium hose, stick a mouthpiece in and check the intonation. You will discover that math and our ears have a different view on what is "in-tune". That is why I do not recommend electronic tuners. Add an old bell to that hose, and things get better.
Whenever I feel blue, I start breathing again.
We have learned that the mouthpiece end is the open end,
and from the laws of standing waves in a tube this should
mean that the wave pressure is low in a mouthpiece, since
the wave pressure is low in an open end.
Some people, who usually know what they talk about, say
otherwise, so my question is:
* is wave pressure low as I expect in the mp end?
* if not, the why not?
Last edited by Sofus; 07-04-2009 at 11:55 AM.
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