Timpani, also known as kettledrums, are large, tunable percussion instruments commonly used in orchestras and concert bands. They consist of a rounded shell made of wood or fiberglass, topped with a drumhead that can be adjusted to produce different pitches. Timpani are played with mallets and can create a range of sounds, from deep, resonant tones to higher pitches. These instruments typically come in sets of two to four drums, each tuned to a specific note. Timpani are often featured in classical music compositions, adding depth and rhythm to the overall sound. Their unique timbre makes them a vital part of many orchestral works.