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By Swami Rajesh Chopra.................. The word piano is a shortened form of the word pianoforte, which is seldom used except in formal language and derived from the original Italian name for the instrument, gravicèmbalo col piano e forte (literally harpsichord with soft and loud). This refers to the ability of the piano to produce notes at different volumes depending on how the keys are pressed. Harpsichords have non-touch-sensitive keyboards. As a keyboard stringed instrument, the piano is similar to the clavichord and harpsichord. These three instruments differ in their mechanisms of sound production. In a harpsichord, strings are plucked by quills or something similar. In the clavichord, strings are struck by tangents, which remain in contact with the string as long as the key is pressed, the note being dampened upon release. In a piano, the strings are struck by hammers, which immediately rebound, leaving the string to vibrate freely.
Like many other inventions, the piano was founded on earlier technological innovations. In particular, it benefited from centuries of work on the harpsichord, which had shown the most effective ways to construct the case, soundboard, bridge, and keyboard. Cristofori, himself an expert harpsichord maker, was well acquainted with this body of knowledge. Cristofori's great success was in solving, without any prior example, the fundamental mechanical problem of piano design: the hammers must strike the string, but not touch it once they have struck (which would damp the sound). Moreover, the hammers must return to their rest position without bouncing violently, and it must be possible to repeat a note rapidly. Cristofori's piano action served as a model for the many different approaches to piano actions that followed. Cristofori's early instruments were made with thin strings and were much quieter than the modern piano. Compared to the clavichord (the only previous keyboard instrument capable of dynamic nuance), however, they were considerably louder and had more sustaining power. Cristofori's new instrument remained relatively unknown until an Italian writer, Scipione Maffei, wrote an enthusiastic article about it (1711), including a diagram of the mechanism. This article was widely distributed, and most of the next generation of piano builders started their work because of reading it. One of these builders was Gottfried Silbermann, better known as an organ builder. Silbermann's pianos were virtually direct copies of Cristofori's, with one important addition: Silbermann invented the forerunner of the modern damper pedal, which lifts all the dampers from the strings at once. Silbermann showed Bach one of his early instruments in the 1730s, but Bach did not like it at that time, claiming that the higher notes were too soft to allow a full dynamic range. Although this earned him some animosity from Silbermann, the criticism was apparently heeded. Bach did approve of a later instrument he saw in 1747, and even served as an agent in selling Silbermann's pianos.
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