The Clarinet BBoard
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Author: Chris P
Date: 2018-08-25 21:57
The speaker mechanism is either linked to the left thumb (most student level plastic basses) or to the throat A key (pro Leblanc basses and others) on instruments with the single register mechanism.
On these basses the lower (larger) vent opens when the thumb is holding down the speaker key and either the thumb is off the thumbplate or the throat A key is opened to give throat Bb.
On instruments with the double register mechanism which is most pro level basses (Buffet, Selmer and Yamaha and some Leblancs), it's linked to both the throat A and also to the RH3 fingerplate to determine which vent will open at any point - the lower vent is open from throat Bb to upper register Eb, then releasing RH3 will switch the vents so the lower one closes and the crook key opens for notes from upper register E upwards.
Older basses often had two separate (simple action) speaker keys for the left thumb - the lower one at 12 O'clock is for throat Bb to upper register Eb, then the upper one at 2-3 O'clock used from upper register E upwards and is done by releasing the other speaker key touchpiece to make the changeover. You don't hold both thumb keys down together as that will mean both vents are open at the same time.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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danceforlife731 |
2018-08-25 06:48 |
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clarnibass |
2018-08-25 10:48 |
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Re: Double register neck on a single register instrument? new |
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Chris P |
2018-08-25 21:57 |
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danceforlife731 |
2018-08-26 00:11 |
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Chris P |
2018-08-26 01:36 |
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The Clarinet Pages
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