| 摘要 |
PURPOSE:To obtain the electronic musical instrument which can be controlled easily to a desired musical performance sense by controlling the musical performance sense varied complicatedly, based on at least two variables, securing an actual equation of motion of a musical performance operating piece by comparing with an ideal equation of motion, and controlling the musical performance operating piece by deriving its difference. CONSTITUTION:A key 1 has mass mr, is coupled to a fixed base 4 by a spring 2 having a spring coefficient kp and a damper 3 having a coefficient of viscosity kv, and receives F and fu as external force. As a result of these external force, a position (x) of the key 1 is varied. As shown in the lower stage, a key 6 having mass md is coupled to the base 4 by a spring 7 of a spring coefficient kpd, coupled to a damper 8 of a coefficient of viscosity kvd, and corrected by the external force fu so that the key 1 executes the same motion as the time when the position (x) of the key 6 is varied by receiving the force F. When the force fu is given by an actuator, a dynamic characteristic of the key 1 shown in the upper stage in the figure becomes equal to a dynamic characteristic of a key provided with such a constant as shown in the lower stage. In such a way, a desired touch sense can be given to a keyboard of the electronic musical instrument. |
