A loop pedal is a device used by musicians to record and play back audio in real-time. It allows performers to layer sounds by recording a segment of music and then playing it back while adding new layers on top. This creates a rich, multi-instrumental sound using just one instrument or voice. Loop pedals are popular among solo artists, especially guitarists and vocalists, as they can create complex arrangements without needing a full band. Many musicians use them in live performances to enhance their sound and engage the audience, making them a versatile tool in modern music.