Touch response apparatus for electronic musical apparatus

A touch response apparatus for an electronic musical instrument comprising:

• a touch data generating means for generating a touch data as a function of a depression status of a key,
• an envelope data generating means for generating an envelope data,
• a setting means for establishing a maximum value of said envelope data generated by said envelope data generating means in accordance with said touch data generated by said touch data generating means,
• a control means for dividing an envelope into a predetermined number of steps in an amplitude direction in accordance with said maximum value established by said setting means and for detecting the arrival of said envelope data generated by said envelope data generating means at respective steps, and
• an envelope data generation control means for changing a manner of generating said envelope data from said envelope generating means when said control means detects said arrival of said envelope data.

A touch response apparatus for an electronic musical instrument comprising:

• a key touch detecting and holding circuit provided for each key of a keyboard;
• each of said key touch detecting and holding circuits comprising at least one charging circuit including a capacitor, at least one discharging circuit, and at least one switch means for providing a signal representing a key "on" status of the key to a key assignor;
• a gate circuit connected to said key touch detecting and holding circuit, respectively, and operating in accordance with a signal from said key assignor;
• an analog to digital converter circuit to which the outputs of the respective gate circuits are commonly connected;
• thereby causing said discharging circuit to discharge electric charge stored in said capacitor in relation with a touch status of the key and said analog to digital converter circuit converting the voltage of said capacitor to a digital value to thereby produce a touch data representing the touch status of the operated key.

A touch response apparatus for an electronic musical instrument having a keyboard, comprising:

• a touch data generating means for generating a touch data as a function of a key depression status of an operated key of said keyboard;
• a basic clock signal generating means for generating a basic clock signal;
• an envelope counting means;
• a preventing means coupled to said envelope counting means for preventing at least one said basic clock signal generated from said basic clock signal generating means from being supplied to said envelope counting means as a clock signal when said basic signal is generated at a plurality of times in accordance with said touch data generated from said touch data generating means;
• and
• control means coupled to said envelope counting means and to said touch data generating means for comparing an envelope data outputted from said envelope counting means with said touch data generated by said touch data generating means so as to change a counting manner of said envelope counting means according to the result of said comparing operation.