| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to obtain always natural and good musical tones even in the state that a damper pedal is operated by defining the phase corre sponding to the state that sound production stop is instructed and the prohibition of the sound production stop is instructed with plural phases and controlling phase transition. SOLUTION: A CPU 5 executes the operation control over the entire part of the device in accordance with the key information and touch data of a keyboard circuit 2 detected by a key scanning/touch detecting circuit 3, the state of the respective switches of a panel circuit 4 and the on/off states of a damper pedal 1, etc. This CPU 5 defines the three phases corresponding to the key off (sound production stop) and the damper pedal 1 on (prohibition of the sound production stop) and controls an amplitude envelope generating circuit 94. Such phenomenon that the rise of an attach is incomplete is prevented even when the damper pedal 1 is turned off right after the key-on in the on-state of the damper pedal. |
