Electronic musical instrument with effect control dependent on expression and keyboard manipulation

Claim 2

An electronic musical instrument which comprises: a controllable tone source section for developing tone signals; at least one tone modifying circuit cooperative with said controllable tone source and receptive of said tone signals for developing time variations of the frequency and amplitude of said tone signals to modify the tonal effect of said tone signals; at least one modification signal generator which develops modification signals applied to said tone modifying circuit for determining the frequency and amplitude variations of said tone signals developed by said tone modifying circuit; a control panel section which produces at least one first control voltage applied to said modification signal generator for controlling said modification signal; an expression-keyboard controlled section including manually set expression control device and a keyboard for producing at least one second control voltage whose value is representative of the setting of said expression control device and said keyboard; and means for selectively applying said second control voltage to said modification signal generator for controlling said modification signal.

Claim 3

An electronic musical instrument which comprises: a controllable tone source section for developing tone signals; a controllable variable amplifier connected to said controllable tone source section for receiving the tone signals; a variable filter connected to said variable amplifier for receiving an amplified tone signal output from said variable amplifier; a vibrato signal generator for developing a vibrato signal and connected to said tone source section for modifying the frequency of said tone signals; a tremolo signal generator for developing a tremolo signal and connected to said variable amplifier for varying the amplitude of said amplified tone signal output; a filter control signal generator producing a filter controlling signal and connected to said variable filter for modifying the frequency spectrum of the amplified tone signal passing through said variable filter; a control panel section producing first control voltages which are applied to said vibrato signal generator, said tremolo signal generator and said filter control signal generator, respectively, to control their operation; and an expression-keyboard controlled section including manually set expression control device and a keyboard for developing second control voltages whose values are representative of the setting of the expression control device and the operation of said keyboard; and means for selectively applying said second control voltages to said vibrato signal generator, said tremolo signal generator and said filter control signal generator, respectively, to control their operation; whereby the amplitude and frequency variations developed in said tone signals may be developed independently of or dependently of said tone signals.

Claim 4

An electronic musical instrument which comprises: a controllable tone source section for developing tone signals; a controllable variable amplifier connected to said controllable tone source section for receiving the tone signals; a variable filter connected to said variable amplifier for receiving an amplified tone signal output from said variable amplifier; a vibrato signal generator for developing a vibrato signal and connected to said tone source section for modifying the frequency of said tone signals; a tremolo signal generator for developing a tremolo signal and connected to said variable amplifier for varying the amplitude of said amplified tone signal output; a filter control signal generator producing a filter controlling signal and connected to said variable filter for modifying the frequency spectrum of the amplified tone signal passing through said variable filter; a control panel section producing first control voltages which are applied to said vibrato signal generator, said tremolo signal generator and said filter control signal generator, respectively, to control their operation; and an expression-keyboard controlled section including manually set expression control device and a keyboard for developing second control voltages whose values are representative of the setting of the expression control device and the operation of said keyboard; and means for selectively applying said second control voltages to said vibrato signal generator, said tremolo signal generator and said filter control signal generator, respectively, to control their operation; whereby the amplitude and frequency variations developed in said tone signals may be developed independently of or dependently of said tone signals.

Claim 5

An electronic musical instrument as claimed in claim 2 in which said control panel section comprises control circuits for producing said first control voltages, and said expression-keyboard controlled section comprises polarity control circuits for developing said second control voltages; a mixer circuit for mixing outputs from said expression device and keyboard; and switching means for selectively applying an output from the mixer circuit to selected ones of the polarity control circuits.

Claim 6

An electronic musical instrument as claimed in claim 3 in which each of said polarity control circuits is provided with a variable resistor having a sliding contact and having one end directly connected to said switching means and its other end connected through an inverter to said switching means so that the polarity and value of said control voltage output from said polarity control circuit is developed by adjusting the positioN of a sliding contact of the variable resistor.