Klarinet Archive - Posting 000303.txt from 1995/02

From: Jon Delorey <Jon_Delorey@-----.COM>
Subj: Re: Clarinet acoustics / J.
Date: Wed, 15 Feb 1995 04:31:44 -0500

RE>Clarinet acoustics / J. DeL. etc. 2/15/95 7:13 AM

>The new fundamental formed when a clarinet's speaker
>hole is opened will not be identical in frequency to
>the corresponding partial in the spectrum of the
>non-overblown note - clearly, the relevant
>characteristics of the tube will be different.
>Roger Shilcock

As it turns out any deviation from a perfect cylinder will cause the next 12th
to be out of tune. In the case of conical bore instruments any deviation from a
perfect cone will cause incorrect overblown octaves. Even with the speaker key
in the perfect position (which apparently it is not). All the pertubations due
to holes and changes in bore diameter will change the frequency of the first
12th's. I suppose features such as polycylindrical bores could be used to
corrrect this relationship to some degree.