Author: jhoyla
Date: 2008-11-20 05:51
Back on topic (I hope):
A Person_13:
We're all sending you suggestions to resolve your "weird gurgling sound played on my lowest F and any note lower than that " problem.
Most of us seem to be thinking it is some problem with the instrument.
Could you please try the "vacuum test", and let us know? Maybe we can help.
Thanks,
J.
P.S. Here it is again:
The Vacuum Test in brief (each joint separately)
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Close all the holes and the bottom bore hole,
suck a vacuum and see how long it holds.
If it holds for less than 8 seconds, you have a problem.
And now, that vacuum test in more detail:
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To test the top joint, take out the reed, dampen your fingers, close all the holes, seal the bottom of the top joint (I use my RH ring finger to seal the bore-hole) and then suck as strong a vacuum as you can manage into the reed-well. Close off the vacuum with either your top or bottom lip, and start counting seconds until your lip falls away.
How many seconds did it hold? If it held less than 8 seconds you have a problem with your top joint regulation.
For the bottom joint use the same technique, only this time you finger bottom C with your RH dampened fingers and close off the bore with your LH, simultaneously closing the bottom B pad manually. It's a bit tricky but doable. rotate the joint a little so that the armatures don't interfere, and suck a vacuum as before. Same 8 second test.
[note: a more objective way of timing the vacuum is to finger either LH G# or 1st Octave key on a semi-automatic model, and time until the key springs open. Use the B pad on the bottom joint.]
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The Oboe BBoard
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