| US 7,521,627 B2 | ||
| Automatic player musical instrument, automatic player incorporated therein and method used therein | ||
| Tomoya Sasaki, Shizuoka-ken (Japan) | ||
| Assigned to Yamaha Corporation, Shizuoka-Ken (Japan) | ||
| Filed on Feb. 27, 2008, as Appl. No. 12/37,953. | ||
| Application 12/037953 is a division of application No. 11/227020, filed on Sep. 15, 2005, granted, now 7,361,828. | ||
| Claims priority of application No. 2004-268458 (JP), filed on Sep. 15, 2004. | ||
| Prior Publication US 2008/0156181 A1, Jul. 03, 2008 | ||
| Int. Cl. G10H 1/06 (2006.01) | ||
| U.S. Cl. 84—735 [84/692; 84/719; 84/723; 84/742; 84/744] | 3 Claims |
| 1. A method for reenacting a performance represented by a set of pieces of music data through a musical instrument, comprising
the steps of:
a) determining a reference trajectory, on which a linkwork incorporated in said musical instrument is to travel so as to cause
a tone generator to produce a tone, on the basis of a piece of music data incorporated in said set;
b) acquiring a piece of detecting data representative of an actual physical quantity expressing motion of said linkwork;
c) comparing said motion expressed by said actual physical quantity with the motion presently expected on said reference trajectory
to see whether or not a difference takes place therebetween;
d) determining control parameters varied together with said motion and mass of said linkwork when the answer at said step
c) is given affirmative;
e) determining a new value of magnitude of a driving signal on the basis of said difference and said control parameters;
f) supplying said driving signal to an actuator associated with said linkwork so that said actuator exerts force corresponding
to said new value of said magnitude on said linkwork, thereby forcing said linkwork to travel on said reference trajectory;
g) keeping said driving signal at a prevent value of said magnitude so that said linkwork continuously travels on said reference
trajectory when said answer at said step c) is given negative; and
h) repeating said steps a) to g) until said linkwork reaches the end of said reference trajectory.
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