Author: David Spiegelthal ★2017
Date: 2006-11-14 23:41
A simple improvement which I've found to work pretty well with no adverse effects (none that I've noticed, anyway) is to remove the register tube and chamfer both the inside and outside ends, using a 45-degree countersink or equivalent sort of tool. This makes the register tube look more like a venturi than a strict cylindrical or conical tube. Even better if the straight taper is faired into the straight walls of the tube by filing or using a very small Dremel tool, so as to make the modification more of a smoothly-curved radiussing rather than a straight chamfer. I have no theoretical basis for why this might improve things, nor do I have good scientific test results, but my impression is that it seems to improve upper clarion and altissimo response and clarity of the throat Bb, without worsening intonation in any register.
I usually combine this with a tapered cork pad on the register key, sort of a poor-man's "Hasty pad" if I understand correctly what the latter is.
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