Embouchure is the use of the lips, facial muscles, tongue, and teeth in playing a wind instrument. This includes shaping the lips to the mouthpiece of a woodwind instrument or the mouthpiece of a brass instrument. The word is of French origin and is related to the root bouche, ‘mouth’. Proper embouchure allows instrumentalists to play their instrument at its full range with a full, clear tone and without strain or damage to their muscles. https://en.wikipedia.org/wiki/Embouchure
Mio Flutes – How to Create a Proper Embouchure
Mercedes Smith , Principal Flutist of the Utah Symphony
Sir James Galway Masterclass Embouchure
Gary Schocker talks about embouchure
Flutoral embouchure
Gary Schocker speaks about embouchure.
Practical Hints on Playing the Flute
Belwin-Mills Publishing Group, 1983
Dr. Richard Hahn, Professor of Flute at the University of Idaho, was historically significant with his work on embouchure relating it to a “soda straw”. He includes this information in this Practical Hints series he did in collaboration with James D. Ployhar.
In Unit IV: Embouchure and Tone he reminds you that a sound is produced on a flute when the airstream is directed across the embouchure hole so that 50% of the air goes into the flute and 50% continues across the flute. When you know this is gives you an idea of how this affects your tone, as you are beginning to work on your flute sound.