Solenoid driving apparatus for actuating key of player piano

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