Hi all,
I would like to ask/confirm a part of double tonguing.
As my own understanding, the "tu" is to "leave" the tip of the tongue from the tip of the reed so that the first sound can be produced. Then the "ku" is the back of the tongue "release from blocking the air from diagram" in order to produce the second sound. For these both sounds, the diagram keep constant pressure, i.e. pressure of diagram does not stop.
In other words, the first sound is produced because the tip leave the reed. The second sound is produced because air is released to the reed.
Then, after the "second sound", the tongue back to the bottom of the mouth, and now we can produce next cycle of "tu-ku".
As a result, by comparing with "normal tonguing", "double tonguing" will be more effective because 2 sounds can be produced by 1 "back-and-forth" of the tongue instead of 2 "back-and-forth" of the tongue in single tonguing.
Thank you so much for your clarification.
-Stanley