According to wikiwand “The xylophone (from Ancient Greek ξύλον (xúlon) ‘wood’, and φωνή (phōnḗ) ‘sound, voice’; ’sound of wood’) is a musical instrument in the percussion family that consists of wooden bars struck by mallets. Like the glockenspiel, the xylophone essentially consists of a set of tuned keys arranged in the fashion of the keyboard of a piano.
Each bar is an idiophone tuned to a pitch of a musical scale, whether pentatonic or heptatonic in the case of many African and Asian instruments, diatonic in many western children’s instruments, or chromatic for orchestral use.”
Shola Emmanuel share more, but saxophone
