| 摘要 |
PURPOSE:To simplify the constitution of the title device as the whole by constituting said device so that a two-stage output response characteristic is generated by a common depressing pressure detecting means. CONSTITUTION:When a player depresses a key 3, a resistance value R of a depressing pressure detecting part 4 is reduced along a first response characteristic cure part K1 according as the key 3 compresses a push spring 13. When the player changes the pressure applied to the key 3 after compression of the spring 13 is terminated, the resistance R is changed along a second response characteristic curve part K2. When the resistance R is changed along the curve part K1, a touch response detection signal generating circuit 14 sends an initial touch detection signal SINI from an initial touch signal generating circuit. When the player changes his finger pressure after compression of the spring 13 is terminated, the depressing pressure applied to the key 3 is detected by a detecting part 4, and thereby, an after touch detection signal SAFT is sent from an after touch signal generating circuit 27 of the circuit 14 at each time of obtaining a timer interruption signal. |
