When developing your embouchure, one should keep the following points in mind:
- The embouchure should provide an air-tight seal around the mouthpiece
- The embouchure will need to support different pressures for different ranges of notes on the saxophone, but the shape of your embouchure should stay consistence and avoid unnecessary movements
Because everybody is built differently, there is not a universally "correct" embouchure. One should strive to develop an embouchure that allows you to effortlessly play the whole range of the saxophone with minimum or no change in embouchure shape.
In order to provide a most effective seal around the mouthpiece, one should strive to develop strength in all the muscles around your lips, and apply even pressure all around the mouthpiece. Common symptoms of over-worked/underdeveloped embouchure include "smiling" and biting too hard.
A strong embouchure should be able to sustain the highest air pressure you can produce while still being relaxed. However to achieve this relaxation one must first exercise the muscles to develop the strength. It is like a body builder can easily lift a 60lb dumbbell while an untrained person can't, at least without exerting a certain amount of effort.
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