Klarinet Archive - Posting 000850.txt from 2000/09
From: Bill Hausmann <bhausmann1@-----.com> Subj: Re: [kl] Reed behavior on mouthpiece Date: Tue, 26 Sep 2000 18:01:37 -0400
At 09:04 AM 9/26/2000 -0700, Clark W Fobes wrote:
>I am partially wrong in saying "never". Please read Backus, "The
Acoustical Foundations of Music", pg 229 -231. He says:
>
>"For soft tones the reed never touches the mouthpiece. As blowing pressure
is increased, the amplitude of the reed vibration increases until for loud
tones the the tip of the reed is against is against the tip of the
mouthpiece for approximately half each cycle."
>
>I have a problem with this statement and the nature of the experiment.
First, Backus has no clear description of what "loud" means. To a musician
this could mean anything from f to fff. When does the reed start to
actually beat against the tip? Perhaps his "loud" is out of the range of
95% of general performance levels.His experiment or the experiment he
refers to was done with a mechanical device that simulated an embouchure.
In performance we tend to back off the pressure as we reach the loudest
dynamic to prevent the reed form closing off.
>
I believe that the point where the transition occurs is where one moves out
of subtone, which sounds airy precisely because the air continues to flow
through without being stopped. I think Andy Laszlo in his recent post
really nailed what happens: "What you really got is a venturi effect
pulling the reed and the mouthpiece together. When they touch the airflow
is interupted, and the reed springs back allowing the air to flow and the
reed to be pulled down again."
Bill Hausmann bhausmann1@-----.com
451 Old Orchard Drive http://homepages.go.com/~zoot14/zoot14.html
Essexville, MI 48732 ICQ UIN 4862265
If you have to mic a saxophone, the rest of the band is too loud.
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