Author: seabreeze
Date: 2017-12-04 17:34
When you use the "half-hole" technique with the left hand first finger, it certainly functions as a register key. But you usually don't use that subtle fingering position on the defining upper break interval of clarion C to altissimo C# a half tone higher. Plus that first finger can assume three different positions on the first tone hole: open, closed. or half open, which pretty much destroys the analogy, I think.
The register key (with the assistance of the thumb hole) has a clear binary function--it's either open or closed. The left hand first finger plays a more complex, multiple role. Because of this complexity, I suppose, when I've tried the analogy of register key and left hand first finger with students, it seems to confuse them. When I specifically teach half-holing for smooth interval connection, then they easily see the true but limited value of the analogy.
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The Clarinet BBoard
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