| 摘要 |
PURPOSE:To quickly and surely generate a musical tone adapted to a noise generating mechanism of a natural musical instrument by bringing a signal of a necessary frequency to initial input to a loop circuit having a delay means and for forming a musical tone signal by allowing an excitation signal to circulate repeatedly. CONSTITUTION:When a signal INIT of a frequency corresponding to a sound pitch from a musical tone control information generating circuit 21 circulates as an initial signal through a loop circuit having a bidirectional transmission circuit 20, a multiplier 15, an adders 13, 16, a ROM 11 for generating a non- linear function, etc., through an adder 17, and it is detected that a loop output reaches a prescribed level by a level detecting circuit 23, the input of the signal INIT is stopped. In this state, pressure information P corresponding to blowing pressure of a wind instrument, offset information E corresponding to pressure applied to a reed by holding a mouthpiece in the mouth, and a constant G for simulating an operation of the mouthpiece and the reed are added to the adders 13, 16 and the multiplier 15, respectively and by the signal for circulating through the loop, a musical tone adapted to a noise generating mechanism of a natural wind instrument is formed quickly and surely. |
