Klarinet Archive - Posting 001213.txt from 2000/06

From: "Dee D. Hays" <deehays@-----.net>
Subj: Re: [kl] Pitch Survey
Date: Tue, 27 Jun 2000 17:36:02 -0400

----- Original Message -----
From: <mus_ldj@-----.edu>
Subject: Re: [kl] Pitch Survey

> I see what you're saying. As the horn warms up the pitch does to. The
> swelling causes the lengthy of the horn to become longer, right? How do I
> control tuning on the effer?
>
>

Incorrect. The small amount that the instrument length would change due to
thermal expansion would not cause a measureable change in the pitch. I've
run the math on this one. Besides that lengthening the horn makes it go
flatter not sharper.

The sharpening effect is due the the relationship of pitch to the density of
air. As air gets warmer, the density drops, sound travels faster and the
pitch rises. When you blow into a cold horn, the cold horn cools your
breath so at that point in time the measure pitch is low. As the horn warms
up, it doesn't cool your breath so much so the pitch rises from your initial
status.

How do you control tuning on an Eb?
1. Carefully selected mouthpiece
2. Carefully selected reed
3. Carefully selected instrument
4. Perfect control of the embouchure
5. Perfect control of the breath support
6. Perfect control of the oral cavity (tongue position, etc).
7. Lots of practice
8. ** PRAY **

Dee Hays

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