Percussion instruments are played by hitting, shaking, or scraping them. Some percussion instruments are u201ctunedu201d, meaning they produce either one or several notes. Others are u201cuntunedu201d and make a sound that isnu2019t identified with a particular note.n
Some instruments, like the xylophone or the marimba, are set up like a keyboard. These instruments can play melodies, and even harmonies.