lecture22 - Keyboard Instruments Types of keyboard...

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Keyboard Instruments Types of keyboard instruments: Piano (strings are set into vibration by striking hammers) Harpsichord (strings are plucked) Organ (sound is produced by air blowing into pipes) A. Piano 1. Construction of piano Keyboard (more then seven octaves: 88 notes, A 0 - C 8 ) Action Strings (more then 200) Bridge Soundboard Frame Invented in 1709 by Bartolomeo Cristofori in Florence The upright piano has been developed in the middle of 19 th century
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2. Piano strings (general information) Typical concert grand piano has 243 strings: 8 single strings wrapped with one or two layers of wire 5 pares wrapped (5x2=10) 7 sets of three wrapped (7X3=21) 68 sets of three unwrapped (68x3=204) Small grand piano has less strings String length from ~2m to ~5cm String extend from the pin block across the bridge to the hitch-pin rail Vibration of the strings is transmitted to the sound board by the bridge Bass strings overlap the middle strings, to act nearer to the center of the sound board
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To obtain high level of loudness tension should be as high as possible
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