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Re: Pitch question?

Author: kdk ★2017
Date: 2014-07-05 20:44

Just to clarify, are you talking about different barrels, or shortening an existing 66 mm barrel?

It occurs to me it *might* make a difference (whether or not the difference would be enough to mean anything, I don't know). Because of the barrel's taper, if you cut one made to be 66 mm, you *might* end up reducing the volume of air inside by more than you would if you used a different barrel made with the same opening diameters as the original 66 (I'm not sure if that's as clear as it could be).

I don't remember ever having a barrel shortened, but when switching barrels, I find very little - maybe 10 cents - difference on the long notes going from 66 to 65. More, of course, perhaps twice as much, at the throat end of the clarinet.

But even with different barrels, the difference in pitch will depend on the bore dimensions as well as the length - the pitch effect is the result of the change in internal volume, not just length. I have barrels of 66 mm and 65 mm that produce identical pitches, presumably because the bore volume of the shorter barrel is equal to that of the longer one.

Karl

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