| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that a temporal tone change peculiar for a natural music sound non-cyclic in rising and gradually cyclic after rising can not be simulated since a waveform (tone) is approximately fixed after rising of a musical sound waveform signal. <P>SOLUTION: A multiplier 13 multiplies a gain K<SB>n</SB>read out of a table 20 for gain control and variable with the passage of time corresponding to a count value of a counter 19 for measuring time to a different (yi<SB>n</SB>-y<SB>n</SB>) between a reference waveform yi<SB>n</SB>generated by a waveform generating part 15 or a delayer 16 and a vibrating waveform y<SB>n</SB>generated by a nonlinear vibrating part 11 to obtain a forced vibrating waveform b' (fy<SB>n</SB>=K<SB>n</SB>(yi<SB>n</SB>-y<SB>n</SB>)) with respect to the nonlinear vibrating part 11, and external forced vibration (perturbation) is performed upon a differential equation f (ΔT, K<SB>n</SB>) of the nonlinear vibrating part 11 by this forced vibrating waveform b'. <P>COPYRIGHT: (C)2004,JPO |
