Author: kdk ★2017
Date: 2011-07-12 02:35
Unlike resting your top teeth on the mouthpiece, biting is pressing your bottom teeth (covered by your bottom lip) with unnecessary force against the reed, resulting in pressing it upward against the mouthpiece rails and closing the aperture, preventing the reed from vibrating enough to produce a musical sound. It's too much upward jaw pressure.
It isn't so much, by the way, that your top teeth rest on the mouthpiece. It's more a case of the mouthpiece resting against your top teeth. Your top teeth wouldn't be going anywhere whether the mouthpiece were there or not. For most players the mouthpiece rotates downward over (around) the bottom jaw and the teeth act as a limit to the rotation. The mouthpiece presses against the top teeth, not the other way around. Which is why pressing upward too much with the lower teeth pinches the reed. The top teeth don't - can't, unless I misunderstand - move. The lower half of the jaw moves toward and away from the upper half, which, it seems to me, is immobile.
Karl
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The Clarinet BBoard
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