An audio mixer is a device used to combine, adjust, and process multiple audio signals. It allows sound engineers and musicians to control the volume, tone, and effects of each audio source, such as microphones, instruments, and recorded tracks. This helps create a balanced and polished final sound for live performances or recordings. Mixers come in various types, including analog and digital models, each with unique features. They often include faders, knobs, and buttons for easy manipulation of sound levels and effects. Audio mixers are essential tools in the music industry, broadcasting, and film production, ensuring high-quality audio output.