The principle of harpsichord is similar to that of clavichord, but the difference is that the sound is made by plucking the strings through a birdfeather tube or a small reed installed at the back end of the keys.
Because the clavichord and harpsichord are very weak, and the sound they make is very light, and the volume can't be changed according to people's needs, so they lack expressiveness and it is difficult to meet the requirements of playing.
/kloc-At the beginning of the 8th century, barto Lomeo CrisTofili, an Italian musical instrument manufacturer, improved the harpsichord, wrapped leather on the hammer and invented the mechanical hammer piano with keyboard, thus laying the foundation for modern piano. This improvement makes up for the serious defect that the volume of clavichord and harpsichord is difficult to adjust. Players can change the volume at will by tapping the keys, which is much larger than that of the clavichord and harpsichord, greatly enhancing the expressive force of the piano.
In 182 1, Sebastian Eller improved the mechanical mechanism for striking strings into a compound vibration performance mechanism, which enabled the player to repeatedly strike the keyboard at a higher speed and play complex music.
1825, for the first time, Alphonse Bakcock adopted a cast iron string frame, which increased its ability to withstand the huge tension after the strings were tightened, so that the tightened strings would not relax due to the deformation of the string frame. This improvement creates good conditions for the stability of piano pitch and the improvement of its service life.
In 1850, the supporting structure, the cross arrangement of strings and the compound vibrating string striking machine are combined together, thus establishing the most ideal basic form of modern piano structure.
After 300 years of development and improvement, modern pianos have been continuously enriched and improved in variety and performance.