Mallet instruments are a family of percussion instruments that produce sound when struck with mallets. Common examples include the xylophone, marimba, and vibraphone. These instruments typically feature wooden or metal bars arranged in a keyboard layout, allowing musicians to play melodies and harmonies. The sound of mallet instruments varies based on the material of the bars and the type of mallets used. For instance, softer mallets create a warmer tone, while harder mallets produce a brighter sound. Mallet instruments are often used in orchestras, bands, and solo performances, showcasing their versatility in various musical genres.