Patent ID: 8350143
Filing Date: 2013-01-08
Classification: G10F

Abstract:
1. A keyboard musical instrument used for a performance of a music tune, comprising: a keyboard including plural keys independently moved by a human player, and used for specifying tones to be produced; a tone generating system connected to said plural keys, and generating said tones specified through the moved keys; a key driving system provided for said plural keys, and selectively driving said plural keys without manipulation on said plural keys carried out by said human player on the basis of target key motion vectors expressing target movements of the keys to be moved for performing a part of said music tune; a key motion reporter monitoring said plural keys, and producing performance parameters expressing actual movements of said keys moved by said key driving system and said human player; a key motion controller connected to said key driving system and said key motion reporter, and determining said target driving vectors for said keys to be moved on the basis of scheduled displacement vectors each expressing a displacement from the movement of the key previously moved by said key driving system or said human player to the movement of one of said keys to be moved and detected key motion vectors produced from said performance parameters and expressing said actual movements; and a performance rule changer connected to said key motion controller, and changing said scheduled key motion vectors for the keys to be moved on the basis of difference between said target driving vectors expressing the target movements of the keys moved by said key driving system and said human player and said detected key motion vectors expressing said actual movements of said keys moved by said key driving system and said human player.