Question: what materials are used to make xylophone?
Answer: The modern western xylophone has bars of rosewood, padauk, or various synthetic materials such as fiberglass or fiberglass-reinforced plastic which allows a louder sound. Some can be as small a range as ​2 1⁄2 octaves but concert xylophones are typically ​3 1⁄2 or 4 octaves.