Voltage controlled oscillator with variable core for electronic musical instrument and related methods

A signal generator for a musical instrument comprising:

• a voltage-controlled oscillator (VCO) comprising a control voltage input and a VCO output, wherein the control voltage input controls a frequency of the VCO output;
• a controller configured to control the voltage-controlled oscillator by inputting a sequence of analog control voltages from a plurality of preloaded control voltage inputs;
• and
• a comparator that defines an amplitude of the VCO output, wherein the controller is further configured to control the amplitude defined by the comparator using a sequence of preloaded comparator voltages.

A method for generating a signal for a musical instrument comprising:

• providing a voltage-controlled oscillator (VCO) comprising a control voltage input and a VCO output, wherein the control voltage input controls a frequency of the VCO output;
• controlling the voltage-controlled oscillator by inputting a control voltage sequence of analog control voltages selected from a plurality of preloaded control voltage inputs;
• and
• selecting the sequence of control voltages by random variable generation, based on a desired waveform selected by a user or based on control voltages or other parameters selected by a user or combinations thereof.

A method for generating a signal for a musical instrument comprising:

• providing a voltage-controlled oscillator (VCO) comprising a control voltage input and a VCO output, wherein the control voltage input controls a frequency of the VCO output;
• controlling the voltage-controlled oscillator by inputting a control voltage sequence of analog control voltages selected from a plurality of preloaded control voltage inputs;
• and
• providing a comparator that defines an amplitude of the VCO output, wherein method comprises controlling the amplitude of the VCO output using a sequence of preloaded comparator voltages.

A signal generator for a musical instrument comprising:

• a voltage-controlled oscillator (VCO) comprising a control voltage input and a VCO output, wherein the control voltage input controls a frequency of the VCO output;
• a controller configured to control the voltage-controlled oscillator by inputting a sequence of analog control voltages from a plurality of preloaded control voltage inputs;
• and
• a comparator that defines an amplitude of the VCO output, wherein the controller is further configured to control the amplitude defined by the comparator using a sequence of preloaded comparator voltages, where in the controller further comprises a multiplexer configured to define some of the plurality of VCO control voltages as selectable as inputs to the VCO and to define others of the plurality of VCO control voltages as selectable as the sequence of preloaded comparator voltages.