Here is a link to download my “Correct Embouchure” PDF. In this document I briefly describe how the lips should move when you play the trumpet. The purpose of this is to build up the embouchure’s ability to correctly resist the air stream. That way you can use your whole body strength to compress air. Without resistance to the air stream it does not matter how hard you blow or how much you blow, you will not be able to develop a strong high register or quality trumpet sound.