The term 'saucer-shaped instrument' can be summarized as a GONG, which is a four-letter word. A GONG is a percussion instrument that is usually made of metal or stone and has a flat, circular shape. It is played by striking it with a mallet, producing a loud, resonant sound. Gongs have been used in many cultures for centuries, often to signal the start or end of an event or to mark the passage of time.