An audio interface is a device that connects musical instruments, microphones, and other audio equipment to a computer. It converts analog signals into digital data, allowing for high-quality recording and playback. This is essential for musicians, podcasters, and sound engineers who want to capture clear audio. Typically, an audio interface features various inputs and outputs, including XLR ports for microphones and 1/4-inch jacks for instruments. Many models also include built-in preamps and MIDI connectivity, making them versatile tools for both home studios and professional setups.