Author: d-oboe
Date: 2007-09-08 17:26
Perhaps it could have been better said as:
There has to be correct air pressure before tonguing a note. One has to experiment to figure out how much air pressure is actually needed, then you can figure out what variables to change. Keep these principles in mind:
Air pressure should stay constant throughout the ranges. It doesn't decrease as you go lower, or increase as you go higher. If air pressure should be "5" then every note played should have an air pressure of "5". Not 1 for low notes, and 8 for high notes. Tuning, "centeredness" are good indicators of this.
Air volume necessary to play decreases as you go up in pitch. Lowest Bb needs the most air, and each note up requires slightly less.
Air velocity necessary to play increases as you go up in pitch.
Air volume and velocity are interdependent. For example, when ascending in range, by keeping pressure the same, the decreased volume of air that passes through the embouchure (by creating a smaller hole through which it can pass) automatically increases the velocity.
Think of a garden hose - once you turn on the hose, it has a set water pressure. As you close off half of the opening, less water gets through, and that water is automatically going at a faster speed.
Same thing for the fluid that goes through your oboe!!
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