Brass instrument an organ or a choir. Brass instrument A brass instrument is a musical instrument that produces sound by sympathetic vibration of air in a tubular resonator in sympathy with the vibration of the player's lips. Brass instruments are also called "labrosones", literally meaning "lip-vibrated instruments". There are several factors involved in producing different pitches on a brass instrument. Slides, valves, crooks (though they are rarely used today), or keys are used to change vibratory length of tubing, thus changing the available harmonic series, while the player's embouchure, lip tension and air flow serve to select the specific harmonic produced from
Mouthpiece (woodwind) The distance between the tip of the mouthpiece and the tip of the reed is known as the "tip opening". The tip opening has little effect on tone, which is more affected by the design of the mouthpiece's chamber (interior space). The "facing" (or "lay") is a curved section that leaves the flat table and continues to the tip of the mouthpiece. The length of a facing—defined as the distance from the tip of the mouthpiece to the point where the reed and mouthpiece meet—can vary. Different facing lengths have different response properties. The reed is held tightly against the