Musical tone signal producing apparatus for simulating the effect of a vibrating element of a wind instrument

摘要

A musical tone signal producing apparatus having a loop circuit portion including a filter circuit and a delay circuit for circulating therethrough a vibratory waveform signal to be produced as a musical tone signal and a control signal generator for generating a first control signal for effecting excitation of the waveform signal in the loop circuit and applying the first control signal to the filter circuit and for generating a second control signal for applying time variation to the waveform signal. The musical tone signal producing apparatus further includes a filter control circuit for modifying the second control signal based on the vibratory waveform signal and for applying a control parameter defined by the modified second control signal to the filter circuit for control of a signal transmission characteristic of the filter circuit.