Embouchure collapse Embouchure collapse Embouchure collapse is a generic term used by wind instrument players to describe a variety of conditions which result in the inability of the embouchure to function. The embouchure is the purposeful arrangement of the facial muscles and lips to produce a sound on a wind or brass instrument. In brass playing, it involves vibration of the membrane area of the lips. Embouchure collapse in its various forms and extremities generally results in difficulty in playing for extended periods (especially if playing loudly and/or in the high register) or a complete inability to play. The former applies mainly
Brass instrument the valves and springs, and the brass of the tubing. This may take the form of desiccant design, to keep the valves dry, sacrificial zincs, replaceable valve cores and springs, plastic insulating washers, or nonconductive or noble materials for the valve cores and springs. Some instruments use several such features. The process of making the large open end (bell) of a brass instrument is called "metal beating". In making the bell of, for example, a trumpet, a person lays out a pattern and shapes sheet metal into a bell-shape using templates, machine tools, handtools, and blueprints. The maker cuts out