Abstract An electronic musical instrument capable of rendering tones of a monophonic continuous scale comprises a performance member including an elongated resistor and an opposing flexible contact wherein a DC current and an AC current are supplied to the elongated resistor and a mixed signal consisting of a DC control signal and an AC control signal is taken out from the flexible contact under the manipulation of the performance member, the DC control signal being varied in magnitude in correspondence to the manipulating position along the performance member, a variable frequency tone generator delivering a tone of a pitch corresponding to the magnitude of the DC component of the mixed signal obtained from the performance member, an envelope forming circuit driven by the AC component of the mixed signal for rendering an envelope signal corresponding thereto, and a switching circuit for switching a tone signal from the tone generator in accordance with the envelope signal, whereby a tone signal having a desired keying (switching) envelope can be obtained from the musical instrument.
An electronic musical instrument comprising a performance member including an elongated resistor and a flexible contact which is disposed parallelly opposing to and normally apart from said elongated resistor, means to supply a DC current to said elongated resistor, a variable frequency tone generator including an oscillator whose oscillation frequency is determined by a DC voltage derived from said flexible contact, the output of said variable frequency tone generator further defining a source of AC current, means coupling said AC current to said elongated resistor, an envelope-forming circuit to produce an envelope signal when an AC signal is supplied from said flexible contact, and a switching circuit means for switching a tone signal from said tone generator in accordance with said envelope signal.
Claim 2
Dependent Claim
123 words
An electronic musical instrument comprising a performance member including an elongated resistor and a flexible contact which is disposed parallelly opposing to and normally apart from said elongated resistor, means to supply a DC current to said elongated resistor, a variable frequency tone generator including an oscillator whose oscillation frequency is determined by a DC voltage derived from said flexible contact, the output of said variable frequency tone generator further defining a source of AC current, means coupling said AC current to said elongated resistor, an envelope-forming circuit to produce an envelope signal when an AC signal is supplied from said flexible contact, and a switching circuit means for switching a tone signal from said tone generator in accordance with said envelope signal.