An audio controller is a device or software that manages audio signals in various applications, such as music production, broadcasting, and live sound. It allows users to adjust volume levels, balance sound, and apply effects to audio tracks. Audio controllers can be physical devices with knobs and sliders or digital interfaces within software programs. These controllers are essential for achieving high-quality sound and ensuring that audio is mixed properly. They often integrate with other equipment like mixers, speakers, and microphones to create a cohesive audio experience. Users can manipulate audio in real-time, making it easier to produce professional-sounding recordings.