Electronic synthesizer with variable/preset voice control
First Claim
1. In an electronic musical synthesizer having a source of tone signals processed by a controllable filter having a variable frequency characteristic adjustable under control of a control signal, the improvement comprising:
- variable means coupled to the controllable filter for generating a variable control signal which is adjustable to alter the frequency characteristic of the filter;
preset means coupled to the controllable filter for generating a preset control signal which produces a fixed frequency characteristic for the filter;
switching means having a preset state; and
circuit means responsive to the preset state of the switch for effectively disabling the variable means and enabling the preset means to cause the filter frequency characteristic to be controlled solely by the preset means.
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Accused Products
Abstract
An electronic musical synthesizer generates tone signals coupled to a controllable bandpass filter and a controllable low-pass filter. A plurality of voice switches are individually selectable to couple preset control voltages to the filters, and to enable potentiometers which can be adjusted to generate control voltages to vary the frequency characteristics of the filters, control the octave of the tone signals, and to control a modulation oscillator. When a variable/preset switch is set to a preset state, the potentiometers are disconnected and auxiliary sections of the selected voice switch presets voltages for the oscillator, the octave circuit and the filters.
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Citations
23 Claims
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1. In an electronic musical synthesizer having a source of tone signals processed by a controllable filter having a variable frequency characteristic adjustable under control of a control signal, the improvement comprising:
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variable means coupled to the controllable filter for generating a variable control signal which is adjustable to alter the frequency characteristic of the filter; preset means coupled to the controllable filter for generating a preset control signal which produces a fixed frequency characteristic for the filter; switching means having a preset state; and circuit means responsive to the preset state of the switch for effectively disabling the variable means and enabling the preset means to cause the filter frequency characteristic to be controlled solely by the preset means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In an electronic musical instrument having a source of tone signal, an oscillator for generating a modulation signal continuously variable under control of a variable impedance, a vibrato switch, and combining means coupled to the source and coupled by the vibrato switch to the oscillator for superimposing the modulation signal on the tone signal and to modulate the tone signal with a vibrato, the improvement comprising:
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preset means effective when coupled to the oscillator for producing a preset modulation signal; a control switch having a preset state; and a control circuit responsive to the preset state for effectively substituting the preset means for the variable impedance to produce a preset vibrato modulation in the tone signal. - View Dependent Claims (8, 9, 10)
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11. In an electronic musical synthesizer having a source of tone signals processed by a controllable filter having a variable frequency characteristic adjustable under control of a control signal, the improvement comprising:
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variable means coupled to the controllable filter for generating a variable control signal which is adjustable to alter the frequency characteristic of the filter; a plurality of voice networks coupled to the controllable filter and each selectable to generate at least one particular preset control signal which imitates a particular voice by producing a fixed frequency characteristic for the filter; switch means having a preset state and a variable state; circuit means responsive to the variable state of the switch means for causing both the particular preset control signal from a selected voice network and the variable control signal to be coupled to the controllable filter and responsive to the preset state of the switch means for effectively disabling the variable means and enabling the plurality of voice networks to cause the filter frequency characteristic to be controlled solely by the selected voice network. - View Dependent Claims (12, 13, 14, 15)
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16. In an electronic musical synthesizer having a keyboard for generating a plurality of tone signals coupled to a channel for processing the tone signals into voice signals, the channel including a controllable filter having a variable frequency characteristic controllable by a variable control signal, the improvement comprising:
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a plurality of individually selectable voice switches each having a preset section and an auxiliary section; a voice preset circuit for coupling the preset section of a selected one of the plurality of voice switches to the controllable filter to generate a preset control signal which produces a selected voice signal different from other selectable voice signals produced for the same tone signal; adjustable means for generating an adjustable auxiliary signal for variable auxiliary control over the voice produced by the channel; - View Dependent Claims (18, 21, 22, 23)
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17. an auxiliary circuit coupled to the auxiliary section of a selected one of the plurality of voice switches for generating a preset auxiliary signal for preset auxiliary control over the voice produced by the channel;
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a control switch having a variable state and a preset state; and a control circuit responsive to the variable state for connecting the adjustable means to the channel and responsive to the preset state for connecting the auxiliary circuit to the channel. - View Dependent Claims (19, 20)
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Specification