Klarinet Archive - Posting 000469.txt from 2000/08

From: Roger Shilcock <roger.shilcock@-----.uk>
Subj: Re: [kl] Unloading.....
Date: Thu, 17 Aug 2000 10:01:15 -0400

This is more or less what I had previously thought.
You were so emphatic about overtones that I started feeling insecure about
this.
Thank you - and, no doubt, you didn't expect to have that effect,
Roger
(3 sentences + bitz OK????)

On Thu, 17 Aug 2000,
Tony Pay wrote:

> Date: Thu, 17 Aug 2000 13:54:52 +0100
> From: Tony Pay <Tony@-----.uk>
> Reply-To: klarinet@-----.org
> To: klarinet@-----.org
> Subject: Re: [kl] Unloading.....
>
> On Thu, 17 Aug 2000 13:37:36 +0100 (BST),
> roger.shilcock@-----.uk said:
>
> > On Thu, 17 Aug 2000, Tony Pay wrote:
>
> > > Do you mean perhaps that you have a difficulty seeing how Fourier's
> > > theorem relates to reality, and want to know whether the overtones
> > > are 'real', in some sense?
>
> > Yes -- that's exactly what I mean.
> >
> > Roger
>
> Well, the overtones in the harmonic case -- a clarinet, say -- are
> audible; if you listen to your low F, you can hear the C a twelfth
> above, and the A a sixth above that, and so on. So they're real in that
> sense. And they're harmonic, ie in whole number ratios with each other.
>
> You can hear the overtones on a piano, too. As I said, they get a bit
> flat as they go up, because the normal modes of oscillation of the
> strings aren't in exact whole number ratios.
>
> What may help is to realise that the normal modes of oscillation of a
> *clarinet* aren't in exact whole number ratios, either. But a piano
> string *has to follow* its normal modes. A clarinet can't, because it's
> oscillation is 'driven'. It settles into a mode of vibration, a whole
> number template, that is a best compromise, in some sense, between the
> normal modes (the natural resonances of the tube).
>
> There's a post about that, too. See:
>
> http://www.sneezy.org/Databases/Logs/1999/01/000043.txt
>
> Hope that helps. Try to write two sentences next time.
>
> Tony
> --
> _________ Tony Pay
> |ony:-) 79 Southmoor Rd Tony@-----.uk
> | |ay Oxford OX2 6RE GMN family artist: www.gmn.com
> tel/fax 01865 553339
>
> ... My haystack had no needle!
>
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