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Re: barrels, theory & practical

Author: Paul Aviles
Date: 2014-09-16 14:25

"Cyclopathic" is correct, the notes at the top of the horn are the ones MOST affected, though there is a 'global' affect to the pitch.

Also, once you leave the chalumeau register, it is the length that becomes the important factor. This is true particularly in the altissimo. I found this to be the case in a mouthpiece test. I used a German mouthpiece vs a Boosey 1010 mouthpiece on a standard French clarinet (Buffet R13). The altissimo notes of the German mouthpiece were decidedly flatter - the length was the longest. The Boosey 1010 mouthpiece made the altissimo notes quite sharp - the length was the shortest though it had the largest internal volume (measured with water).

Getting back to purely barrels, it is worth noting that the affect on the shortest tube length notes becomes less severe once that 'short distance' is lengthened. The example to which I am referring is the German clarinet, where the top joint itself is longer and the barrel is that much shorter. Here, the tuning of the upper most notes are not as disproportionate. Note this quote from the Rossi website:

"Pulling out the barrel achieves lower pitch by lengthening the bore of the entire instrument. However, as a side effect, pulling out also creates an air pocket between the barrel and the top of the clarinet body. Since this air pocket has the most influence on the tone holes which are closest to it, pulling out the barrel on most clarinets results in disproportionately flat throat notes. On Rossi clarinets this problem was solved by designing the top of the clarinet body longer and the barrels correspondingly shorter. This moves the air pocket created by pulling out further away from the throat note tone holes. Pulling out therefore tunes the entire instrument proportionately, and the throat notes do not over-react and sag. As a result, Rossi clarinets are extremely versatile, and the different length barrels provided with all Rossi clarinets ensure a remarkably even tuning scale at both American and European pitch levels."

I don't agree that it solves the issue, I only agree that it makes the situation a bit better.

...............Paul Aviles

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derf5585

2014-09-16 07:43