Patent ID: 7432430

Claim:
A musical instrument for producing tones, comprising: plural tone generating linkwork selectively actuated for specifying the tones to be produced, each of said plural tone generating linkworks having a hammer and string, which is deflected when said hammer is brought into collision with said string for producing the tone; and a music data producer including plural sensors monitoring said hammers and producing signals representative of plural series of pieces of motion data expressing motion of the associated hammers on respective trajectories, a data processing unit connected to said plural sensors and having an analyzer analyzing said plural series of pieces of motion data so as to determine current values indicative of unique points on said trajectories, a judge determining whether or not said hammers reach said unique point at previous values and a rectifier adding a value indicative of the amount of deflection to said current value so as to determine true values expressing said unique points on the basis of said current values when said judge makes the negative decision and storing said true values as said previous values in a memory.