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5389730 Emphasize system for electronic musical instrument  
An emphasize system for an electronic musical instrument including filter and control device. The filter extract and output predetermined frequency range component of an input musical tone signal....
4676134 Electronic string instrument with bend detector  
An electronic musical instrument of the stringed type wherein bending of a string results in a change in a parameter of the sound produced. At the bridge of the instrument, each string is connected...
4659996 Method and apparatus for de-ringing a switched capacitor filter  
A switched capacitor filter system is provided which is programmed to filter a predetermined sequence of tone signals. The filter system is de-rung after each selected tone signal is detected by...
4646611 Electronic musical instrument  
An electronic musical instrument is provided with a temporal variation circuit of SCF parameters for temporally varying the filter characteristic of a switched capacitor filter circuit, a control...
4621557 Electronic musical instrument  
An electronic musical instrument which is capable of attaining the tonal coloration and "feeling" of an acoustic instrument and wherein the pitch, timbre, and loudness of each sound which is...
4492142 Timbre modulation circuit for electronic musical instruments  
A timbre modulation circuit for an electronic musical instrument having an automatic rhythm accompaniment system. The timbre modulation circuit is provided in a musical scale tone signal path and...
4428270 Electronic vibrato or celeste  
Electronic circuits are provided for producing an electronic timbre modulation for effecting celeste or vibrato similar in sonic results to the well-known Leslie rotating speaker system. Electronic...
4374482 Vocal effect for musical instrument  
Apparatus for producing a chorale or vocal effect in an electronic musical instrument comprises means responsive to the playing keys of the instrument for producing an indexing signal and means...
4322995 Music synthesizer  
There is disclosed herein a music synthesizer which responds to a music note played by a music instrument. The synthesizer has an envelope generator which generates a control signal in relation to...
4308779 Control waveform generators for electronic musical instruments  
In a control waveform generator for an electronic musical instrument of the type wherein the generator generates a control waveform adapted to control at least one of a tone pitch, a tone color and...
4300435 Synthesizer for organ voices  
In an electronic musical instrument, such as an electronic organ, certain organ voices are synthesized by applying a tone signal to a voltage controlled low-pass sharp cutoff filter, the pass...
4291604 Memory override system for programmed electronic synthesizer  
A programmable electronic musical synthesizer includes a memory controlling a plurality of parameter circuits according to a selected group of stored parameter signals for producing a desired...
4282787 Electronic musical instrument simultaneously operable in monophonic and polyphonic modes  
An electronic musical instrument having combined monophonic and polyphonic sound producing capabilities includes a keyboard simultaneously operating a monophonic tone signal generating circuit and...
4276802 Electronic keyboard instrument  
An electronic keyboard instrument generates signals of frequencies respectively corresponding to keys by depressing the keys of a keyboard from a signal source, and reproduces a musical note...
4244262 Echo-machine employing low pass filters with a variable cut-off frequency  
When the frequency of an input sound signal applied to a shifting type echo-machine is close to that of the shift pulse thereof, a false signal appears at the output terminal of the echo-machine,...
4244259 Electronic musical instrument with memory to store tone control information  
An electronic musical instrument is capable of processing, by the same processing circuit, parameter control analog information signals defining the shape of control waveforms for the modulation of...
4236434 Apparatus for producing a vocal sound signal in an electronic musical instrument  
An electronic musical instrument for producing a vocal sound signal comprising a musical tone signal generator connected to a passing circuit for passing a musical tone signal under the selection...
4214500 Electronic musical instruments  
The electronic musical instrument is provided with a plurality of musical tone generating channels of a number smaller than that of the keys and a channel processor for randomly assigning key...
4195544 Electronic musical instrument with external sound control function  
A musical sound controlling apparatus preferably incorporated into a music synthesizer type electronic music instrument and capable of generating a musical sound controlling signal in accordance...
4186642 Programmable circuits for electronic musical instruments  
A time-shared electronic musical instrument is provided with programmable wave-form generating and tone coloring circuits in order to maintain the musical characteristics regardless of pitch. The...
4173915 Programmable dynamic filter  
A programmable dynamic filter for use with a time-shared electronic organ or the like includes a filter circuit responsive to a logical state of a control signal for tracking notes generated by the...
4106384 Variable filter circuit, especially for synthesizing and shaping tone signals  
A variable filter circuit, especially for synthesizing and shaping tone signals, in which a variable light source is provided which influences light sensitive resistor elements in the filter...
4099439 Electronic musical instrument with dynamically responsive keyboard  
An electronic musical instrument has a keyboard equipped with apparatus for developing a voltage in response to the momentum of operated keys of the keyboard, which voltage is employed to control...
4085648 Electronic sound synthesis  
Method and apparatus for synthesis or imitation of sounds of musical instents wherein the partial tone structure is a function of the volume or intensity impression to be effected with a listener,...
4074605 Keyboard operated electronic musical instrument  
A keyboard operated electronic musical instrument such as an electronic organ is disclosed which generates a musical tone signal by mixing together two different musical tone signals of different...
4062264 Polyphonic musical instrument simulator  
An electronic musical instrument having a plurality of frequency sources driving a plurality of waveshape controlling circuits rendered operative by a plurality of keyswitches comprising a keyboard...
4023455 Circuit for imitating the speech characteristics of reed organ pipes  
In an electronic musical instrument, such as an electronic organ, the speech characteristics of reed organ pipes are simulated by applying pulses produced by key-actuated tone generators, which...
4018126 Tone generation and modification apparatus  
Apparatus is provided for use in electronically creating music or special sound effects through the generation and modification of audio frequency, electrical, tone sequence signals. The apparatus...
4002994 Tone control circuit  
A tone control circuit comprising an operational amplifier having an input and an output and a negative feedback circuit connected between the output and the input, the feedback circuit including a...
3978754 Voltage controlled type electronic musical instrument  
This invention provides an electronic musical instrument comprising a keyboard circuit for producing a pitch determining voltage signal representing the note of an operated key, a voltage...
3974461 Wide dynamic range voltage controlled filter for electronic musical instruments  
A voltage controlled filter for an electronic synthesizer incorporates a plurality of individual voltage controlled filter stages connected in cascade with a variable feedback interconnecting the...
3952624 Electronic musical instrument capable of generating tone signals having pitch frequency, tone color and volume envelope varied with time  
An electronic musical instrument comprising a voltage controlled oscillator, a voltage controlled filter, a voltage controlled amplifier and envelope generators. An output envelope of the envelope...
3948139 Electronic synthesizer with variable/preset voice control  
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...
3939750 Electronic organ  
An electronic organ comprises memory means for memorizing in an analog manner the synthesizing ratio of repetitively occuring waves such as square waves for synthesizing qualities of sound in...
3930429 Digital music synthesizer  
The system of this invention is for use with an electronic musical instrument having a keyboard, and generally includes keyboard circuitry, audio waveform generators, envelope generators, static...
3919648 Voltage-controlled filter  
An audio frequency filter having voltage controlled transfer functions providing one or more of low pass, bandpass and high pass characteristics, selective in terms of cut-off frequencies and...
3911776 Sound effects generator  
A sound effects generator for modifying a sound generating signal is comprised of a voltage-controlled filter having a variable peak response frequency for transmitting at a maximum amplitude those...
3902396 Electronic musical instrument  
An electronic musical instrument comprises a plurality of tone signal synthesizing circuits connected to a keyboard section in parallel with each other and means for combining the outputs of said...
3886836 Electronic musical instrument capable of generating tone signals having the pitch frequency, tone color and volume envelope varied with time  
In response to a pitch determining voltage obtained by key operation, a voltage controlled oscillator generates a tone signal having a pitch frequency corresponding to the note of the operated key....
3881387 Electronic musical instrument with effect control dependent on expression and keyboard manipulation  
Tone signals delivered from a tone source section are passed through a variable amplifier for amplitude modification and a variable filter for frequency spectrum modification. A vibrato signal...
3787602 ELECTRONIC MUSICAL INSTRUMENT WITH SURROUNDING LIGHT SENSITIVE MUSICAL EFFECT CONTROL  
An electronic musical instrument comprising a light-sensitive variable resistor whose resistance varies with the intensity of surrounding light and a musical effect control circuit for controlling...
3749809 CIRCUIT ARRANGEMENT CAPABLE OF CONTINUOUSLY VARYING TONE COLORS FOR ELECTRICAL MUSICAL INSTRUMENTS  
A circuit arrangement connected between tone signal generators and a loud-speaker so as to continuously vary tone colors by successively changing the relatively narrow frequency bands of tone...
3688010 TONE MODULATION SYSTEM  
Musical tone signals in electrical form are applied to a plurality of formant filters which are tuned dynamically by player operated controls and by electronically generated control signals....
3609201 VARIABLE PITCH NARROW BAND NOISE GENERATOR  
A variable pitch narrow band noise generator comprising a noise signal source for generating a noise signal containing broad band frequency components; an amplifier for amplifying the noise signal...
3605042 TREBLE CONTROL CIRCUIT  
A treble tone control circuit in an audio amplifier comprising the series arrangement of a first capacitor connected to one of a pair of circuit input leads, a treble control potentiometer, and a...
3604829 A DYNAMIC VOICING FILTER FOR AN ELECTRONIC ORGAN  
An electric organ having conventional voicing circuits is also supplied with an auxiliary dynamic voicing filter, controlled by the expression pedal of the organ. The voicing filter is an active RC...
3570357 ELECTRONIC MUSICAL INSTRUMENT WITH A TOUCH REPONSIVE DC VOLTAGE GENERATOR  
An electronic musical instrument capable of controlling a tone color of a musical tone at the time of rise of the tone as well as the intensity of the tone in proportion to a key-depressing force...
3569603 MOVING FORMANT BAND-PASS AMPLIFIER FOR AN ELECTRONIC MUSICAL INSTRUMENT  
A circuit for achieving the moving or changing formant effect in an electronic musical instrument such as an electric organ. The circuit employs a band-pass amplifier with parallel T...
3564104 MOVABLE CONTACT CONTROL OF ELECTRONIC MUSIC MODULES  
An electronic musical instrument including a first resistive surface to which a number of control signals are applied in physically spaced relation and from which variable oscillator control...
3550027 PARALLEL T ACTIVE FILTERS WITH ADJUSTABLE Q  
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