Audio interfaces are critical for converting analog audio signals into digital formats that computers can process. These devices are essential in home and professional studios for recording and mixing music. Popular brands include Focusrite (Scarlett series), PreSonus (AudioBox), Universal Audio (Apollo), and MOTU (Track16). Audio interfaces allow musicians to connect microphones, instruments, and other audio sources directly to a computer, providing high-quality sound recording and playback. They are used by musicians, producers, and engineers for everything from podcasting to full-scale music production.