Electronic musical instrument employing a sampling system as a coupler

Claim 2

An electronic musical instrument employing a sampling system as a coupler comprising a. a plurality of tone generators each having an output terminal at which a tone signal is generated, b. a plurality of square waveform voltage generator each having an output terminal at which a square waveform voltage having a predetermined amplitude and repetition frequency is generated, said square waveform generators including duty ratio varying means for varying the duty ratio of said square waveform voltage, c. a plurality of sampling means each having input output and control terminals, the input terminal of each of said sampling means being coupled to a corresponding one of said tone generators, the control terminal of each of said sampling means being coupled to a corresponding one of said square waveform voltage generators, the signal generated at the output terminal said sampling means having a frequency corresponding to the signal applied to the input terminal but having a magnitude an amplitude determined by the duty ratio of the coupled square waveform voltage generator, d. a plurality of coupling means each having at least two inputs respectively coupled to the output terminals of at least two of said sampling means and an output, and e. means for obtaining a musical tone by receiving the signal at the output of said coupling means.

Claim 3

An electronic musical instrument as claimed in claim 1, which further comprises integrators connected between respective said sampling means and said coupling means and in which the sampled tone signal derived from said sampling means is supplied to said means for obtaining a musical tone through said integrator together with other sampled tone signals to be coupled with said tone signal.

Claim 4

An electronic musical instrument as claimed in claim 1, which further comprises a common integrator connected between said coupling means and said means for obtaining a musical tone and in which said sampling means are provided for respective said tone signals to be coupled toGether so as to receive said tone signal, and the sampled tone signals derived from said sampling means are coupled together to be supplied to said means for obtaining a musical tone through said common integrator.

Claim 5

An electronic musical instrument as claimed in claim 1, in which said square waveform voltage has an amplitude greater than the maximum amplitude of said signal to be sampled.

Claim 6

An electronic musical instrument employing a sampling system as a coupler comprising a. a plurality of tone generators each having an output terminal at which a tone signal is generated, b. a plurality of square waveform voltage generators each having an output terminal at which a square waveform voltage having a predetermined amplitude and repetition frequency is generated, said square waveform generators including duty ratio varying means for varying the duty ratio of said square waveform voltage, c. a plurality of sampling means each having input, output and control terminals, the control terminal of each of said sampling means being coupled to a corresponding one of said square waveform voltage generators, the signal generated at the output terminal of said sampling means corresponding to the signal applied to the input terminal but having a magnitude determined by the duty ratio of the coupled square waveform voltage generator, d. a plurality of coupling means each having at least two inputs respectively coupled to the output terminals of at least two of said sampling means and an output terminal, and e. a plurality of envelope circuits each having an input terminal connected to a corresponding one of a plurality of key switches and an output terminal connected to the input terminals of at least two of said sampling means for delivering a depression-responsive signal in response to closure of said key switch for applying said depression-responsive signal to said sampling means as said input signal, f. a plurality of gate means each having an input terminal coupled to a coresponding one of said tone generators, an output terminal, and a control terminal connected to the output of a corresponding one of said coupling means for controlling the transmission of said tone signal to the output terminal of said gate means in response to the sampled depression-responsive signal, and g. means coupled to the output terminals of said gate means to derive musical tones from the signals generated by said tone generators and passed by said gate means.

Claim 7

An electronic musical instrument employing a sampling system as a coupler comprising a. a plurality of tone generators each having an output terminal at which a tone signal is generated, b. a plurality of square waveform voltage generators each having an output terminal at which a square waveform voltage having a predetermined amplitude and repetition frequency is generated, said square waveform generators including duty ratio varying means for varying the duty ratio of said square waveform voltage, c. a plurality of sampling means each having input, output and control terminals, the control terminal of each of said sampling means being coupled to a corresponding one of said square waveform voltage generators, the signal generated at the output terminal of said sampling means corresponding to the signal applied to the input terminal but having a magnitude determined by the duty ratio of the coupled square waveform voltage generator, d. a plurality of coupling means each having at least two inputs respectively coupled to the output terminals of at least two of said sampling means and an output terminal, and e. a plurality of envelope circuits each having an input terminal connected to a corresponding one of a plurality of key switches and an output terminal connected to the input terminals of at least two of said sampling means for delivering a depression-responsive signal in response to closure of said key switch for applying said depression-responsive signal to said sampling means as said input signal, f. a plurality of gate means each having an input terminal coupled to a coresponding one of said tone generators, an output terminal, and a control terminal connected to the output of a corresponding one of said coupling means for controlling the transmission of said tone signal to the output terminal of said gate means in response to the sampled depression-responsive signal, and g. means coupled to the output terminals of said gate means to derive musical tones from the signals generated by said tone generators and passed by said gate means.

Claim 8

An electronic musical instruments as claimed in claim 5, in which said envelope circuits are disposed in each section of a keyboard which is divided into at least two sections, and said sampling means are disposed in the depression-responsive signal transmission passages corresponding to the tone signals to be coupled together thereby attaining the coupling of the tone signals produced from the divided keyboard sections.

Claim 9

An electronic musical instrument as claimed in claim 5, in which each of said envelope circuits includes means for varying the magnitude of the signal output depending on the speed with which the key is depressed.

Claim 10

An electronic musical instrument as claimed in claim 5, n which said square waveform voltage has an amplitude greater than the maximum amplitude of said signal to be sampled.