What is a mute describe how mutes are used in the brass instrument and have affects the sound?

A mute is a device used in brass instruments, designed to alter the instrument's sound by changing its timbre and reducing volume. When inserted into the bell of the instrument, mutes can create a variety of tonal effects, from a softer, more subdued sound to a bright, focused tone. Different types of mutes, such as straight, cup, or harmon mutes, each produce distinct sonic characteristics, allowing musicians to achieve a wide range of expressive possibilities in their performances. Overall, mutes are essential tools for brass players to enhance their sound and adapt to various musical styles.