In wind instruments, sound is generated due to the vibration of the air flow in the cavity of the musical instrument. It is likely that these musical instruments are among the most ancient, along with percussion. The way the musician blows air out of his mouth, as well as the position of his lips and facial muscles, called the embouchure, affects the pitch and character of the sound of wind instruments. In addition, the sound is regulated by the length of the air column using holes in the body, or additional pipes that increase this column. The more air travels, the lower the sound will be. Distinguish woodwind and brass. However, this classification speaks, rather, not about the material from which the instrument is made, but about the historically established way of playing it. Woodwinds are instruments whose pitch is controlled by holes in the body. The musician closes the holes with his fingers or valves in a certain order, alternating them while playing. Woodwinds can also be metal flutes, and pipes, and even a saxophone, which has never been made of wood at all. In addition, they include flutes, oboes, clarinets, bassoons, as well as ancient shawls, recorders, duduks and zurnas. Brass instruments include those instruments whose sounding height is regulated by additional nozzles, as well as by the musician's embouchure. Brass instruments include horns, trumpets, cornets, trombones, and tubas. In a separate article - all about wind instruments.