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Re: High C Adjustment on Bass Clarinet?

Author: Chris P
Date: 2019-03-27 21:22

If high C is difficult (speaker key and left thumb only), then check if the lower register F is speaking cleanly (left thumb only). If it's stuffy or unresponsive, the open G vent pad (tucked under the throat A key touchpiece) may not be closing fully with the left thumb key, but it will still be closed when LH finger 1 is held down so lower register E and F# and upper B will still speak cleanly.

There's no user serviceable adjustment for this as the linkage is reliant on the silencing material and the amount of travel of the left thumbplate. You can check with a feeler gauge (a strip of the thinnest cigarette paper) if both the thumb and G vent pads are closing, but adjusting these keys so both pads close together and with the correct pressure is best left to a woodwind specialist.

Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.

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