18. A mute is an object that is fitted to the end of a brass instrument to change the instrument's sound and tone. Mutes can be made from many materials but aluminum, brass, and copper are common. A mute works by changing the shape of the instrument and absorbing its acoustic vibrations. This causes the instrument to produce a sharp, damp sound. Mutes are often used in jazz music but sometimes they are called for in other compositions as well.
A. Cause and Effect C. Chronological
B. Compare and Contrast D. Problem and Solution 19. Louis Armstrong was hornton noor famihin​