A digital audio interface is a device that connects audio equipment, such as microphones and instruments, to a computer. It converts analog audio signals into digital data, allowing for high-quality recording and playback. These interfaces often use USB, Thunderbolt, or other connections to facilitate communication between devices. Many digital audio interfaces come with built-in preamps, which amplify weak audio signals, and offer multiple input and output options. They are essential for music production, podcasting, and other audio applications, enabling users to achieve professional sound quality with software like Pro Tools or Ableton Live.