Xylophones - Metallophones

The xylophone (from the Greek words ξύλον—xylon, "wood"^[+ φωνή—phōnē, "sound, voice",^] meaning "wooden sound") 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.

The term is also popularly used to refer to similar instruments of the lithophone and metallophone types. For example, the Pixiphone and many similar toys described by the makers as xylophones have bars of metal rather than of wood, and so are in organology regarded as glockenspiels rather than as xylophones. The metal bars found on a glockenspiel generally produce higher high-pitched tones than a xylophone's wooden bars.