Electronic musical instrument capable of modulation controlling a second keyboard section tone signal in accordance with a first keyboard section tone signal

Claim 2

An electronic musical instrument comprising: a first keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a second keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a first musical tone signal producing means connected to said first keyboard section and including a first voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said first section; a second musical tone signal producing means connected to said second keyboard section and including a second voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said second keyboard section; sound reproducing means connected to said first and second musical tone signal producing means; and means for coupling a tone signal from said first musical tone signal producing means to said second voltage controlled oscillator means to thereby modulate the frequency of a tone signal produced by said second oscillator means.

Claim 3

An electronic musical instrument comprising: a first keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a second keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a first musical tone signal producing means connected to said first keyboard section and including a first voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said first section; a second musical tone signal producing means connected to said second keyboard section and including a second voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said second keyboard section; sound reproducing means connected to said first and second musical tone signal producing means; and means for coupling a tone signal from said first musical tone signal producing means to said second voltage controlled oscillator means to thereby modulate the frequency of a tone signal produced by said second oscillator means.

Claim 4

An electronic musical instrument comprising: a first keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a second keyboard section including a plurality of keys and means for generating a pitch determining voltage having a magnitude which is a function of the note of an operated key; a first musical tone signal producing means connected to said first keyboard section and including a first voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said first section; a second musical tone signal producing means connected to said second keyboard section and including a second voltage controlled oscillator means for generating in response to the pitch determining voltage a tone signal having a frequency which is a function of the note of the operated key on said second keyboard section; sound reproducing means connected to said first and second musical tone signal producing means; and means for coupling a tone signal from said first musical tone signal producing means to said second voltage controlled oscillator means to thereby modulate the frequency of a tone signal produced by said second oscillator means.

Claim 5

An electronic musical instrument according to claim 1 wherein said last-mentioned means comprises means for dividing the frequency of the tone signal from said first musical tone signal producing means.

Claim 6

An electronic musical instrument according to claim 1 wherein said last-mentioned means comprises waveform converting means for converting the waveform of the tone signal from said first musical tone signal producing means.

Claim 7

An electronic musical instrument according to claim 3 wherein said waveform converting means includes means to convert the waveform of the tone signal from said first musical tone signal producing means into a plurality of kinds of waveforms and includes swItching means for selecting one of the waveforms.

Claim 8

An electronic musical instrument according to claim 1 wherein said coupling means includes means for coupling the output of said first voltage controlled oscillator means to said voltage controlled oscillator means.

Claim 9

An electronic musical instrument according to claim 1 wherein said second musical tone signal producing means further comprises a voltage controlled filter means connected to said voltage controlled oscillator means for imparting a tone color to the tone signal from said oscillator means, said voltage controlled filter means being operative to vary in response to a control voltage the frequency characteristic thereof; and further comprising means for coupling the tone signal from said first musical tone signal producing means to said voltage controlled filter means as the control voltage.

Claim 10

An electronic musical instrument according to claim 1 wherein said second musical tone signal producing means further comprises a voltage controlled amplifier means coupled to said second oscillator means, said amplifier means being operative to vary in response to a control voltage the gain thereof; and further comprising means for coupling the tone signal from said first musical tone signal producing means to said voltage controlled amplifier means as the control voltage.

Claim 11

An electronic musical instrument according to claim 1 wherein said first and second keyboard sections comprise means for generating in response to key operation first and second trigger signals indicating the key operation respectively; said first musical tone signal producing means comprises a first voltage controlled filter means coupled to said first oscillator means, a first voltage controlled amplifier means coupled to said voltage controlled filter means and first control voltage generating means responsive to the first trigger signal to generate control voltages which vary as a function of time and which are coupled to said first voltage controlled oscillator means, first voltage controlled filter means and first voltage controlled amplifier means; and wherein said second musical tone signal producing means comprises a second voltage controlled filter means coupled to said second oscillator means, a second voltage controlled amplifier means coupled to said second filter means, and second control voltage generating means responsive to the second trigger signal to generate control voltages which vary as a function of time and which are coupled to said voltage controlled oscillator means, second voltage controlled filter means and second voltage controlled amplifier means.

Claim 12

An electronic musical instrument comprising: first and second keyboard sections each having a plurality of keys; first and second musical tone signal producing means respectively coupled to said first and second keyboard sections for producing respective musical tone signals having pitch frequencies which are functions of the notes of keys operated on said respective first and second keyboard sections, at least said second musical tone signal producing means comprising a voltage controlled means for controlling at least one of the pitch frequency, tone color, and volume envelope of a musical tone signal generated by said electronic musical instrument; sound reproducing means coupled to said first and second musical tone signal producing means for generating a musical sound; and means for coupling said voltage controlled means a tone signal obtained from said first musical tone signal producing means in response to key operation on said first keyboard section for controlling said voltage controlled means.

Claim 13

An electronic musical instrument comprising: first and second keyboard sections each having a plurality of keys; first and second musical tone signal producing means respectively coupled to said first and second keyboard sections for producing respective musical tone signals having pitch frequencies which are functions of the notes of keys operated on said respective first and second keyboard sections, at least said second musical tone signal producing means comprising a voltage controlled means for controlling at least one of the pitch frequency, tone color, and volume envelope of a musical tone signal generated by said electronic musical instrument; sound reproducing means coupled to said first and second musical tone signal producing means for generating a musical sound; and means for coupling said voltage controlled means a tone signal obtained from said first musical tone signal producing means in response to key operation on said first keyboard section for controlling said voltage controlled means.

Claim 14

An electronic musical instrument comprising: a first keyboard section for generating a first pitch determining voltage having a magnitude which is a function of the note of an operated key and a first trigger signal indicating the key operation on said first keyboard section; a second keyboard section for generatinG a second pitch determining voltage having a magnitude which is a function of the note of an operated key and a second trigger signal indicating the key operation on said second keyboard section; a first musical tone signal producing means coupled to said first keyboard section and including a first voltage controlled oscillator means for generating in response to the pitch determining voltage from said first keyboard section a tone signal having a pitch frequency which is a function of the note of the operated key, a first voltage controlled filter means coupled to said first voltage controlled oscillator means, a first voltage controlled amplifier means coupled to said first voltage controlled filter means, and first control voltage generating means responsive to the first trigger signal to generate control voltages which vary as a function of time and which are coupled to said first voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means, said first voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means being operative to vary in response to the control voltages, the oscillator frequency of said first voltage controlled oscillator means, the frequency characteristic of said first voltage controlled filter means and the gain of said first voltage controlled amplifier means; a second musical tone signal producing means coupled to said second keyboard section and including a second voltage controlled oscillator means for generating in response to the pitch determining voltage from said second keyboard section a tone signal having a pitch frequency which is a function of the note of the operated key, a second voltage controlled filter means coupled to said second voltage controlled oscillator means, a second voltage controlled amplifier means coupled to said second voltage controlled filter means, and a second control voltage generating means responsive to the second trigger signal to generate control voltages which vary as a function of time and which are coupled to said second voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means, said second voltage controlled oscillator means voltage controlled filter means and voltage controlled amplifier means being operative to vary in response to the control voltages the oscillation frequency of said second voltage controlled oscillator means, the frequency characteristic of said second voltage controlled filter means and the gain of said second voltage controlled amplifier means; second reproducing means coupled to said first and second musical tone signal producing means; and means for coupling as an additional control voltage an output signal from said first voltage controlled oscillator means in said first musical tone signal producing means to at least one of said second voltage controlled oscillator means, second voltage controlled filter means and second voltage controlled amplifier means in said second musical tone signal producing means.

Claim 15

An electronic musical instrument comprising: a first keyboard section for generating a first pitch determining voltage having a magnitude which is a function of the note of an operated key and a first trigger signal indicating the key operation on said first keyboard section; a second keyboard section for generatinG a second pitch determining voltage having a magnitude which is a function of the note of an operated key and a second trigger signal indicating the key operation on said second keyboard section; a first musical tone signal producing means coupled to said first keyboard section and including a first voltage controlled oscillator means for generating in response to the pitch determining voltage from said first keyboard section a tone signal having a pitch frequency which is a function of the note of the operated key, a first voltage controlled filter means coupled to said first voltage controlled oscillator means, a first voltage controlled amplifier means coupled to said first voltage controlled filter means, and first control voltage generating means responsive to the first trigger signal to generate control voltages which vary as a function of time and which are coupled to said first voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means, said first voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means being operative to vary in response to the control voltages, the oscillator frequency of said first voltage controlled oscillator means, the frequency characteristic of said first voltage controlled filter means and the gain of said first voltage controlled amplifier means; a second musical tone signal producing means coupled to said second keyboard section and including a second voltage controlled oscillator means for generating in response to the pitch determining voltage from said second keyboard section a tone signal having a pitch frequency which is a function of the note of the operated key, a second voltage controlled filter means coupled to said second voltage controlled oscillator means, a second voltage controlled amplifier means coupled to said second voltage controlled filter means, and a second control voltage generating means responsive to the second trigger signal to generate control voltages which vary as a function of time and which are coupled to said second voltage controlled oscillator means, voltage controlled filter means and voltage controlled amplifier means, said second voltage controlled oscillator means voltage controlled filter means and voltage controlled amplifier means being operative to vary in response to the control voltages the oscillation frequency of said second voltage controlled oscillator means, the frequency characteristic of said second voltage controlled filter means and the gain of said second voltage controlled amplifier means; second reproducing means coupled to said first and second musical tone signal producing means; and means for coupling as an additional control voltage an output signal from said first voltage controlled oscillator means in said first musical tone signal producing means to at least one of said second voltage controlled oscillator means, second voltage controlled filter means and second voltage controlled amplifier means in said second musical tone signal producing means.

Claim 16

An electronic musical instrument according to claim 10 wherein said last-mentioned means comprises switching means for selectively coupling the output signal from said first voltage controlled oscillator means to one of said second voltage controlled oscillator means, second voltage controlled filter means and second voltage controlled amplifier means.

Claim 17

An electronic musical instrument according to claim 10 wherein said last-mentioned means comprises means for dividing the frequency of the output signal from said first voltage controlled osicllator means, means.