Class 84/700 - Variable

Subclass of Class 84 - Music
Definition: Subject matter wherein the partials or harmonics to be removed
No. of patents: 38
Last issue date: 02/14/1995

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Number	Title	Issue Date
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. The control device control the level of an output from the...	02/14/1995
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 with a leaf spring which is moved towards the nut end of ...	06/30/1987
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 increasing the clock frequency of the switched capacitor fro...	04/21/1987
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 circuit for digitally controlling the temporal variation ci...	03/03/1987
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 produced can be controlled by the performer in real time in an a...	11/11/1986
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 includes a means for generating a control pulse series sync...	01/08/1985
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 signals corresponding to audio tones are generated and ar...	01/31/1984
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 responsive to the indexing signal for sequentially developing...	02/22/1983
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 the input signal to control the loudness of the synthesize...	04/06/1982
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 a tone volume, the control waveform generator is constitu...	01/05/1982
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 characteristic of which has a relatively sharp knee and a rapid...	11/17/1981
4291605	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 the input signal to control the loudness of the synthesize...	09/29/1981
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 timbre of sound. A memory override system is responsive to manu...	09/29/1981
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 a polyphonic tone signal generating circuit. The tone sign...	08/11/1981
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 corresponding to the generated signal. The frequency spectrum of...	07/07/1981
4250789	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 the input signal to control the loudness of the synthesize...	02/17/1981
4248122	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 the output signal to control the loudness of the synthesiz...	02/03/1981
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, in addition to the other type of noise signal caused by inc...	01/13/1981
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 musical tone signals, and analog musical tone signal gene...	01/13/1981
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 of a key. A formant filter is connected in the passing circ...	12/02/1980
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 information representing depressed keys to the musical tone gen...	07/29/1980
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 with vocal signals or musical sound signals produced by musi...	04/01/1980
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 circuits comprise programmable keyers and wave-shapers, pro...	02/05/1980
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 instrument. Means are provided for programming the filter...	11/13/1979
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 circuit. The variable circuit, by the use of selector switches, ...	08/15/1978
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 the amplitude of the sounds produced in response to each ke...	07/11/1978
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, and controlled by controlling the relative content of sig...	04/25/1978
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 waveforms and which changes the sound of the generated musi...	02/21/1978
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 to produce polyphonically, organ voices, piano and harpsi...	12/13/1977
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 pulses are preferably narrow as compared to their repetition ...	05/17/1977
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 is characterized by its ability to generate random, as wel...	04/19/1977
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 plurality of resistors and capacitors for controlling the...	01/11/1977
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 controlled oscillator for producing a tone signal having a tone pit...	09/07/1976
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 input and output stages. Each of the stages is controlled b...	08/10/1976
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 generator has various parameters such as rise time and dec...	04/27/1976
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 couple preset control voltages to the filters, and to enabl...	04/06/1976
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 response to the signals from means for selecting qualities of s...	02/24/1976
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 and dynamic filter circuitry and power amplifier and speaker...	01/06/1976

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Class 84/700 - Variable