Labels:bench | bulletin board | chair | concert grand | dog | grand piano | paper | person | reckoner | vegetarianism OCR: FACTS BOX NAME: GRAND PIANO FAMULY Keyboards. KEYBOARDS PITCH RANGE: Seven-and-a-half octaves (88 notes) COMPLETE MA TERIAL: Wooden case and RANGE soundboard iron frame and steel strings. SIZE: Up to 9 ft (2.7 m) long ORIGINS The grand piano developed from the harpischord in Europe in 1709 CLASSIFICATION: Chordophone: an instrument that produces sound by the vibration of "strings DID YOU KNOW? There are three main sizes of grand piano: baby grand boudoir grand and concert grand FAMILY hrex boudoi
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