| 摘要 |
PURPOSE:To reflect musical tone control parameters in generated musical tones by sensing the entire stroke of an operating element, retriggerably detecting the acceleration of the operating element and changing and controlling the musical tone control parameters according to the acceleration data. CONSTITUTION:The entire stroke of the movement of a key 1 is sensed by a key guide block 10 and a key guide cap 7. The coil patterns of the respective faces face the respective inside surfaces of the cap 7 when the block 10 is inserted to the cap 7. The opposite areas and spacings are changed by the key operation. Since the cap 7 is made of a metal, the inductances of the coil patterns on the respective surfaces change approximately linearly. The touch output level obtd. from the pattern 12a pairs does not fluctuate any longer with each of the keys. The respective coil patterns 12a to 12c are directly coupled to the oscillation circuit of a printed circuit board 8. The pulses of the oscillator are retriggerably counted in a prescribed time unit by an acceleration detecting means during the key operation and the acceleration is detected. The musical tone parameter is changed according to the acceleration data and the oscillation frequency is changed by a change in the L value of the patterns 12, by which the control of both initial/after touches is executed and the intricate musical tone control is executed. |
