Embouchure (from French: holding in the mouth - bouche means
mouth) is how you hold the clarinet in your mouth between your
lips and how you blow into the instrument. The embouchure is the
single most important technique you have to master in order to
develop your sound and to play as effortlessly as possible. I
will discuss the embouchure as precise as possible here since it
is very important, but it is difficult to describe in text. The
best - and fastest - way to learn it is to find a good teacher.
So this is how you do it: - Stand easy and upright. If you
can't, you can of course sit, but in the beginning correct
breathing and holding the clarinet is much easier when standing.
If you sit, for the start you should sit on the edge of the
chair which must not be too low; the thighs should go a little
downwards towards the knees, because otherwise your belly will
be bent inside (your diaphragm can't move easily) and free
breething becomes more difficult. - You hold the clarinet in an
angle of about 45 degrees