Musical tone generating apparatus with parameter controller for changing characteristics of musical tone signal

A musical tone generating apparatus comprising:

• musical tone source means for generating a musical tone signal;
• and
• parameter control means responsive to the musical tone signal for controlling a tone parameter which characterizes tone color of said musical tone signal by changing a value of said tone parameter, said parameter control means comprising:
• target value generating means for generating a target value of said tone parameter;
• and
• interpolating means for interpolating between a present value of said tone parameter and said target value, so that said present value is renewed consecutively;
• said target value generating means comprising a central processing unit and said operation of said target value generating means including an operation to determine and set a basic tone waveform of said musical tone signal to be generated, wherein said central processing unit operates to generate said target value only when said interrupt signal is provided from said interpolating means.

A musical tone generating apparatus comprising:

• musical tone source means for generating a musical tone signal;
• and
• parameter control means responsive to the musical tone signal for controlling a tone parameter which characterizes tone color of said musical tone signal by changing a value of said tone parameter, said parameter control means comprising:
• target value generating means for generating a target value of said tone parameter;
• and
• interpolating means for interpolating between a present value of said tone parameter and said target value, so that said present value is renewed consecutively;
• said target value generating means and said interpolating means operating independently, said interpolating means generating an interrupt signal to said target value generating means when said present value reaches said target value, so that operation of said target value generating means is interrupted, and then said target value generating means operating to generate a new target value to said interpolating means in response to said interrupt signal.