| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to synthesize a musical sound without any inconvenience even when a low band component with a long period is incorporated in an excitation signal by attenuating the low band component of the excitation signal with a low band attenuation means, inputting the excitation signal subjected to low band attenuation to a loop means and synthesizing the musical sound. SOLUTION: In an electronic instrument of inputting the excitation signal to a loop circuit (LOOP) 42 containing a delay circuit (DELAY) 47 setwith a delay time answering to the pitch of the musical sound to be generated and synthesizing the musical sound, the low band component of the excitation signal is attenuated. That is, the excitation signal inputted to a resonator part is inputted to one side input end of an adder 44 after its low frequency component is obstructed in the HPF 43 of the LOOP 42 to be fed back to the other side input end of the adder 44 through an LPF 45, an APF(all-pass filter) 46, the DELAY 47 and a multiplier 48. Then, according to repeating circulation in the loop, phase differences among respective frequency components are changed to be attenuated gradually. |
