| 摘要 |
The system contains a string strike servo signal generator so that the manual key playing signal generator generates an analog or digital signal. The signal is amplified by the transmission and processing system of the key strike servo signal for remote transmission to one or several terminal servo pianos, the signal is received by a key strike servo signal system and converted into drive commands for a driver circuit in order to drive the string striking hammers. The string strike servo signal can also be transmitted to a data recording device before it is transmitted to a terminal-type piano so that the recital can be repeated. The frequency of each string of the piano can be checked with the aid of a tuning plate of a detector device and on the basis of the detector signal, a motor for each individual string is driven for tuning its tension. The adjustment can be automatically stopped with the aid of solenoid brakes on each individual string. <IMAGE>
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