 The Clarinet BBoard
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Author: Ben Shaffer
Date: 2020-07-23 16:40
If you have a Clarinet that has been rebored, will it play sharper or Flatter than what it played prior to being rebored?
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Author: Ken Lagace
Date: 2020-07-23 17:46
Complicated question. Where rebored? Rebored back to spec? Basically enlarging the bore everywhere will make the pitch lower, but more in the upper part of the cylinder. If proportionally bored, more at the bottom then the top, than tuning will go awry.
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Author: Ben Shaffer
Date: 2020-07-23 18:07
Thanks for the Info
Low Notes seem flat higher notes sound sound alittle sharp
Has a 66mm Barrel .
I also have a 65mm Barrel sounds about the same.
The Clarinet actually sounds wonderful and sounds in tune with itself.
Could it be my Mouthpiece?
Post Edited (2020-07-28 01:28)
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Author: jdbassplayer
Date: 2020-07-23 18:28
Sorry to disagree Ken but that doesn't seem to be correct. You can try this yourself with a clarinet mouthpiece, 2 pieces of paper and some tape. Make 2 tubes with the paper and tape, one larger in diameter than the other. Then use the tape to attach the mouthpiece. You should find that the larger tube is higher in pitch. This is the same reason why the lowest toneholes on an A clarinet are lower than the same toneholes on a basset clarinet.
Based on some testing I've done an even enlarging will cause sharpness in the lower register but will cause the upper clarion register to go flat. But keep in mind you would have to remove a lot of material to get a noticable change, at least a few 10ths of a mm (contrary to popular belief decades of swabbing will not enlarge your bore enough to cause any noticable change in intonation). It wouldn't make the whole instrument flat overall.
What makes you think your clarinet was rebored? Is there are measurable difference in the upper joint vs the lower joint? Can you post dimensions.
-Jdbassplayer
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Author: Ken Lagace
Date: 2020-07-23 18:37
Thanks Jdbassplayer for the clarification. My statement was a very general basic observation with limited information. Larger bore, where the higher vibrations occur, will make the higher vibrations lower.
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Author: m1964
Date: 2020-07-23 19:25
Ben Shaffer wrote:
“If you have a Clarinet that has been rebored, will it play sharper or Flatter than what it played prior to being rebored?”
A year ago I bought an A Buffet R13 Prestige that had beautiful sound but was out of tune- both with itself and very flat. It took some work on tone holes and key height adjustments and shortening the barrel to 63.5mm to make it tune to 440Hz. And still, it had very uneven tuning.
I eventually sold it because I could not afford two instruments- one for ochestra playing and another for myself.
At the time, I posted a question here and it was suggested that the clarinet may had warped bore.
I would try to bring it to a tech who really knows his/her stuff to find out if anything can be done to make it tune well.
My 2p
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Author: Bennett ★2017
Date: 2020-07-23 20:14
I've read that a Bb clarinet can be repurposed into an A by putting a string inside its length. If this is at all true, it would indicate that the pitch can be lowered by decreasing the volume of the bore.
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Author: Ben Shaffer
Date: 2020-07-23 20:45
Here are the Readings....using a fairly good accurate Ruler
Upper Joint Entrance Hole 14.9mm
Exit Hole 15.00mm
Lower Joint Entrance Hole 22 mm
Exit Hole 22mm
The Upper Joint has a metal ring around the Entrance Hole
Post Edited (2020-07-28 01:30)
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Author: jdbassplayer
Date: 2020-07-23 20:58
Oh yeah you definitely got unlucky and got one of the reamed out Leblancs. Still if it plays in tune with itself now then all you should need is a properly designed barrel, probably one with a large bore around 15mm. I don't think it's a lost cause.
The same reamers used for Grenadilla wood work for nickel silver tenon caps (the rings at the end). The metal used in reamers (hardened tool steel) is much harder than nickel silver. I believe most manufactureres install the tenon caps before reaming.
-Jdbassplayer
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Author: Ben Shaffer
Date: 2020-07-24 04:34
This Clarinet sounds about the same as my Normandy
Post Edited (2020-07-27 00:11)
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