| 摘要 |
PURPOSE:To reduce the turned-back noise, to accurately control the musical sound frequency, and to obtain the stable operation free from abnormal oscillation by driving a nonlinear part circuit by a clock having a frequency higher than the sampling frequency of a linear circuit and connecting the linear circuit and the nonlinear circuit with a sampling frequency converting circuit between them. CONSTITUTION:A linear part 11 which simulates the sound emitting body of a natural musical instrument subjects an input signal to delay processing and filtering, and the signal processing in each part is performed synchronously with the clock having a sampling frequency FS. A nonlinear part 12 which simulates the exciting mechanism of the natural musical instrument is operated synchronously with a clock having a sampling frequency N.FS (N is an integer) to output an exciting signal. A resampler 13 converts the exciting signal to a signal having the sampling frequency FS and supplies it to the linear part 11. An interpolator 14 performs the linear interpolating operation of the sampling frequency FS to feed back the sampling frequency N.FS to the nonlinear part 12. |
