 The Clarinet BBoard
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Author: skennedy
Date: 2009-08-16 16:22
Are the R13 and the Festival the only poly-cylindrically bored Buffet instruments being made? What about the Tosca and the RC?
Thanks
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Author: Caroline Smale
Date: 2009-08-16 22:52
All Buffet professional instruments, including RC and Tosca, are now polycylindrical, even the E13 intermediate model is.
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Author: Barry Vincent
Date: 2009-08-16 22:59
What pray tell is a polycylindrical bore ? I just went & looked up inside my Clarinets & all I see is one bore. ? One per clarinet that is:)
Skyfacer
Post Edited (2009-08-16 23:02)
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Author: JJAlbrecht
Date: 2009-08-16 23:43
Polycylindrical means that the taper of the bore is not a "perfect" cone or cylinder, but rather varies in the change from narrow to more open, as you progress from the tuning barrel to the bell.
The Festivals, Prestige and R13 have one design, the RC/Prestige RC have a different bore, as does the Tosca.
Jeff
“Everyone discovers their own way of destroying themselves, and some people choose the clarinet.” Kalman Opperman, 1919-2010
"A drummer is a musician's best friend."
Post Edited (2009-08-16 23:44)
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Author: ned
Date: 2009-08-17 09:52
JJAlbrechect says ''Polycylindrical means that the taper of the bore is not a "perfect" cone or cylinder, but rather varies in the change from narrow to more open, as you progress from the tuning barrel to the bell. ''
Can you please describe the difference between a polycylindrical and non-polycylindrical bore?
tks
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Author: kilo
Date: 2009-08-17 11:38
"Polycylindrical means that the taper of the bore is not a "perfect" cone or cylinder, but rather varies in the change from narrow to more open, as you progress from the tuning barrel to the bell."
So:
"Non-polycylindrical" means that the taper of the bore is a "perfect" cylinder, and doesn't vary in the change from narrow to more open, as you progress from the tuning barrel to the bell.
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Author: Alseg
Date: 2009-08-17 13:12
Actually, it is narrowest where the upper joint joins the lower....that is where the titular bore is measured and reported when manufacturers state the single bore dimension. Polycylindrical means it reaches this point in steps or increments rather than a gradual slope.
The top of the barrel might be, say, .590 in. with the junction of the main joints being, say .566, and the maker would list the .570 as being the "bore" of this instrument, often reported in mm, or 14.66mm
Former creator of CUSTOM CLARINET TUNING BARRELS by DR. ALLAN SEGAL
-Where the Sound Matters Most(tm)-
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Author: Paul Aviles
Date: 2009-08-17 13:16
It may help to throw in the concept of reverse taper as on sees in a Moening barrel. The diameter of the bore is actually larger at the top than at the bottom, so imagine various point along the inside of the clarinet where that happens.
Unless you use a very accurate caliper at those various points, however, you wouldn't really pick this up visually.
...............Paul Aviles
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Author: Don Berger
Date: 2009-08-17 15:10
To me, this is an approximation to a [very slight] conical machining of the top portion of the upper joint, its purpose being to produce better tuning of the 12ths, [clarion register]. This appears now to have become common pratice by Buffet in the 1950's and used by other makers. Carree is regarded as the inventor, tho I have never found any patent info in the US in this regard. Likely there are patents, at least in France, tho the principle of "modified" bores dates back much earlier and can be found in some pre 1950 clarinets and some US patents. If I have some facts and concepts wrong, please correct me, I've tried to find info on this subject for many years with little success [mfgr secrecy?], and will appreciate any help. Don
Thanx, Mark, Don
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Author: Caroline Smale
Date: 2009-08-17 18:42
Many top line clarinets in the past had a reverse cone in the top joint, either extending about 1/3 way down but in some cases extending the whole length.
In a way this could be viewed as poycylindrical with an infinite number of very short parallel sections.
The intent with both forms is similar i.e. to improve tuning of the twelths (and to some extent also the higher harmonics).
There is also an effect on the tone and response of the instrument. With so many variables the makers are just striving to achieve the optimum balance in all these things.
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