One-string instruments are musical instruments that produce sound using a single string. They are often played by plucking, bowing, or striking the string. Examples include the diddley bow, a simple instrument from African American folk music, and the singing string, which is used in various cultures for storytelling and entertainment. These instruments can vary in size and shape, but they typically have a resonating body that amplifies the sound. One-string instruments are often used in traditional music and can be found in many cultures around the world, showcasing the diversity of musical expression.