Klarinet Archive - Posting 000017.txt from 1999/01

From: "Edwin V. Lacy" <el2@-----.edu>
Subj: RE: [kl] re:Intonation training
Date: Fri, 1 Jan 1999 23:22:34 -0500

On Thu, 31 Dec 1998, Martin Pergler wrote:

> "Out-of-tune-ness" between 2 instruments can be caused not only by
> mismatched fundamental frequencies or percieved pitch whan playing
> alone, but even between higher peaks. For instance, an overly
> simplified ex:
>
> Inst A with peaks at freq 440 879 1320
> Inst B with peaks at freq 440 881 1320
> both have fund freq 440 and peaks at almost 2x440, 3x440, so
> perceived pitch at 440 Hz.
> But, if they play together, get 440 and 1320 but also 879 and 881.
> Ouch. 2 beats per second!

According to all I have ever heard and read about the field of acoustics,
the opinion of acousticians is that in the case of wind instruments, the
above would be impossible. I have questioned many of them about precisely
this question, and their answer has always been that the partials *must*
be whole number multiples of the frequency of the fundamental.

I would appreciate being made aware of any references which would support
your position and refute the one which acousticians have given me.

Ed Lacy
el2@-----.edu

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