Patent ID: 7179974

Claim:
A method for retrofitting a keyboard musical instrument to an automatic player keyboard instrument, comprising the steps of: a) preparing an automatic playing system to be assembled with a keyboard musical instrument, which includes a cabinet having a stationary board, a keyboard having plural keys and mounted on said stationary board and a tone generating system responsive to a fingering on said keyboard for generating tones; b) marking at least one reference seal in said stationary board at a certain position determined on the basis of said keyboard so that said at least one reference seal is related to said keyboard; c) making a gadget related to said keyboard through said at least one reference seal; d) forming holes at target positions in said stationary board by means of said gadget already related to said keyboard so that said holes are exactly located below said keys, respectively, and e) assembling a key drive unit of said automatic playing system with said stationary board in such a manner that plural plungers of said key drive unit pass through said holes, respectively.