Cymbals are typically made of copper alloys, round with a raised center and thin edges. Their timbre varies, allowing for diverse sound effects that enhance music's rhythm. Larger cymbals produce deep, loud sounds, while smaller ones offer bright, focused tones. Heavy cymbals sustain longer with a full sound, whereas lighter ones are crisp and responsive. Thicker cymbals sound dull and powerful, while thinner ones are bright. Gongs, also made of copper and round with a bulging center, have a loud, penetrating tone that captures attention. They hold cultural significance in many traditions. Gongs are played by striking with a hammer. A larger gong produces a grand sound, while a smaller one sounds crisp. Thick gongs offer stable, lasting tones, while thin gongs are bright and short. A large gong navel gives a deep sound, while a small one produces a brighter tone.