Author: southron
Date: 2020-01-13 20:40
Attachment: lower-joint_top-covered-key.jpg (71k)
stuffy C#/G# - it does not sound "clean"... Also, the chalumeau D is not as bright as the notes around it- it sounds slightly softer than E and C...
By "chalumeau D" do you mean the D which lives just beneath the Treble Clef?
Traditionally the problem in clarinets is with the D an octave above there [in the clarinet's upper register, within the Treble Clef itself].
But if you really do mean the D just beneath the Treble Clef, then you're having problems with two consecutive notes, C# followed by D, and you simply cannot write that off as a coincidence.
It could be a gazillion different things [to include a design flaw in that series of Buffets], but one obvious place to start looking would be the covered key at the very top of the lower joint.
See the attached picture.
That covered key [and its pad] could be sitting a few tenths of a millimeter too low, and might not be leaving a large enough opening for good airflow when notes are played at the bottom of the upper joint.
PS: Anything on the upper joint involving further undercutting of the C hole or the C# hole, or on the lower joint hole beneath that top covered key, is going to be VERY PERILOUS, because you're so close to the end of wood, and further undercutting is just begging for a crack to develop.
I wouldn't authorize undercutting that close to the end of the wood unless it were someone who knew precisely what the heck he was doing.
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The Clarinet BBoard
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