Nippon Gakki Seizo Kabushiki Kaisha

Mitsuhiko Mori

Shigeru Muramatsu

Yuji Fujiwara

Takamichi Sawase

A solenoid driving apparatus for actuating keys of a player piano is provided in which respective key striking strength data can be applied to respective solenoids of keys, so that musical tones can be reproduced correctly and in which the key striking strength data at the time of musical performance can be compensated for high fidelity reproduction. The solenoid driving apparatus includes a plurality of keys and solenoids provided on each key. When a key is depressed, a first key striking strength data corresponding to key striking strength and a data designating the depressed key are generated. The first key striking strength data is then converted into a second key striking strength data so as to make the latter data in linear proportion to an operating or response speed of the solenoid. In accordance with the second key striking strength data, a solenoid driving data is generated, and is applied to the solenoid corresponding to the key designated by the designating data. The solenoid driving data thus converted from the second key striking strength data causes musical tones to be reproduced as having correct timings and high fidelity.

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Hamamatsu, Japan

Mitsuhiko Mori