Klarinet Archive - Posting 000570.txt from 2004/11

From: John Dablin <jdablin@-----.com>
Subj: Re: [kl] Meaning of undercut tone holes?
Date: Fri, 19 Nov 2004 14:25:59 -0500

On Friday 19 Nov 2004 15:25, Vann Joe Turner wrote:
> Hi all,
>
> Can somebody explain a term for me. I've heard it for years, but have no
> mental picture of what it means.
>
> What is meant by undercut tone holes?
>

I'm sure there are better people than me who could explain this, but what I've
always understood it to mean is widening the inside of the hole where it
meets the bore. I've always imagined it to be like countersinking a screw
hole so that the head of the screw sits level with the surface, except in
this case there is no screw and the surface is the inside of the bore.

I read somewhere (probably on this list :-) ) that it's done with a special
cutter which folds up to go through the hole, then opens up like an
inside-out umbrella.

If I've got this wrong in any way, I'd be delighted if someone could correct
me.

John Dablin
Aylesbury UK

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