Lead Pipe

Billy B · Posted: Sun May 05, 2013 4:40 am Post subject: Lead Pipe

The length of a Bach lead pipe produces approximately a concert Eb. Playing that pitch allows the lips to vibrate in-synch with the vibrating air molecules within the trumpet. The next harmonic that appears is up a 9th, approximately concert F. Then D, then G. You can play other pitches but you would then be out of synch with the instrument. I have a pipe that I cut down to 4.5 inches and it produces a concert Eb up an octave. I do not know what the pitch is of just the mouthpiece. As far as things changing when you connect the rest of the trumpet? Yes and no. IMO the trumpet is much more forgiving than the lead pipe. Do a gliss on your trumpet then do a gliss on the lead pipe. Play the lead pipe to lock in the imagined sound(90%) with the breath(9%) and a small amount of physical awarenes(1%). Then take that formula to the trumpet.
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Bill Bergren

k0elw · Posted: Tue Oct 28, 2014 8:31 am Post subject: playing leadpipe

Recently I've been playing the lead pipe by removing the first valve slide and depressing the first valve. The resonant pitch is F rather than Eb. The sound comes directly at me through the valve slide tube which makes it easier to hear impurities in the sound. It is easier to remove and replace the first valve slide than the tuning slide. Thoughts?
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Don Herman rev2 · Posted: Tue Oct 28, 2014 10:30 am Post subject:

http://en.wikipedia.org/wiki/Fundamental_frequency

The leadpipe should fit the case of the pipe closed at one end.
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k0elw · Posted: Tue Oct 28, 2014 11:17 am Post subject:

I'm not sure what the point of this wiki link is, I'm not afraid of math and physics. My question is whether the excercise as I just described is functionally equivalent (unless there is something magic about Eb) to removing the tuning slide. I think they are functionally equivalent but am always happy to be corrected from error.
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Ellis Workman
Radio Frequencies; Icom 706 MKIIG, G5RV up 55 feet
Audio Frequencies; Schilke B1

PH · Posted: Tue Oct 28, 2014 11:52 am Post subject:

It should be functionally equivalent. I'll be curious to try this.
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Don Herman rev2 · Posted: Tue Oct 28, 2014 6:10 pm Post subject:

Sorry, my post was in response to Bill's implied question about the relationship between pitch and leadpipe (or mouthpiece) length.

The greater length also adds resistance in addition to lowering the pitch. Can't imagine why it wouldn't work, but I'd worry about blowing spit in my face...
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"After silence, that which best expresses the inexpressible, is music" - Aldous Huxley