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| Number | Title | Issue Date |
| 4658691 | Electronic musical instrument An electronic musical instrument includes circuitry for modifying an ordinary address signal which changes at a uniform rate over one cycle of a waveform, into a modified address signal whose rate varies in one cycle of the waveform by the use of a modifi... | 04/21/1987 |
| 4656912 | Tone synthesis using harmonic time series modulation A keyboard operated electronic musical instrument is disclosed which has a number of tone generators that are assigned to actuated keyswitches. Musical tones are produced by computing a master data set which defines the data points corresponding to a peri... | 04/14/1987 |
| 4655115 | Electronic musical instrument using amplitude modulation with feedback loop In a musical tone synthesizer in which an amplitude-modulated carrier wave delivered from an amplitude modulator is used to form a musical tone signal, the amplitude-modulated carrier wave is fed back to the input side of the amplitude modulator as a modu... | 04/07/1987 |
| 4644839 | Method of synthesizing musical tones The generating function cos[Z(t).multidot.sin(ω't)] of Bessel functions is utilized as a modulating function for a fundamental function sin(ωt) in synthesis of a musical tone including many harmonic (over tone) components, wherein Z(t) is used as a modu... | 02/24/1987 |
| 4643066 | Electronic musical instrument An electronic musical instrument capable of producing, by frequency modulation, a musical tone containing harmonic components of integer and non-integer orders at complicated ratios which change with time. In frequency modulation, amplitudes of carrier an... | 02/17/1987 |
| 4554857 | Electronic musical instrument capable of varying a tone synthesis operation algorithm This electronic musical instrument has plural operation units respectively performing a predetermined basic waveform generation operation (e.g., frequency modulation operation) using a phase signal representing a pitch of a tone to be produced or a wavefo... | 11/26/1985 |
| 4485717 | Electronic musical instrument An electronic musical instrument which produces a musical sound by controlling harmonics coefficient and using computing means based on the discrete Fourier transfer. For a fundamental wave, a period function indicated by predetermined period data is gene... | 12/04/1984 |
| 4457631 | Attenuation-modulation circuit for generating electronic bell sounds for a timepiece An electronic bell sound generating circuit for a timepiece for generating a sound simulating a bell sound produced by a motor driven bell-striking system. The circuit includes an audio frequency signal generating circuit, an optional number of attenuatio... | 07/03/1984 |
| 4455911 | Electronic musical instrument of frequency modulation tone synthesis type An electronic musical instrument using FM tone synthesis technology produces a musical tone signal e(t) expressed as where A I, ωct and ωmt represent an amplitude information, a modulation index information, a carrier frequency information and a modulat... | 06/26/1984 |
| 4453441 | Frequency modulator for an electronic musical instrument A keyboard operated electronic musical instrument is disclosed which has a number of tone generators that are assigned to actuated keyswitches. A tone generation computation means is implemented using a combination of an even symmetric function and an odd... | 06/12/1984 |
| 4422362 | Electronic musical instrument of a formant synthesis type A musical tone is synthesized by frequency modulation which realizes a desired fixed formant. A first accumulator repeatedly adds a constant corresponding to a center frequency of the fixed formant at a regular time interval to generate phase angle data o... | 12/27/1983 |
| 4418600 | Electronic musical instruments of the type synthesizing a plurality of partial tone signals A predetermined frequency signal is amplitude modulated with a time window signal having a predetermined time width to simultaneously calculate a plurality of frequency components distributed over a predetermined frequency bandwidth and having the frequen... | 12/06/1983 |
| 4406204 | Electronic musical instrument of fixed formant synthesis type A musical tone is synthesized by controlling harmonic components of a note selected in a keyboard in accordance with a desired fixed formant. A parameter computation circuit detects a harmonic frequency which is nearest to a center frequency of the fixed ... | 09/27/1983 |
| 4402243 | Synthesizer circuit for electronic musical instrument A digital synthesizer primarily intended for use in electronic musical instruments which are microprocessor controlled includes a plurality of storage devices which contain numerical data commensurate with the characteristics of an output signal to be pro... | 09/06/1983 |
| 4393742 | Electronic musical instruments of the type synthesizing a plurality of partial tone signals An electronic musical instrument sequentially calculates a plurality of partial tone signals which are amplitude-modulated by a plurality of time window signals, on the time division basis, such that these partial tone signals are synthesized to form a mu... | 07/19/1983 |
| 4393743 | Electronic musical instruments of the type synthesizing a plurality of partial tone signals In an electronic musical instrument, where a musical tone signal having a plurality of partial tone components in a predetermined bandwidth is produced by amplitude-modulating a carrier signal according to a time window signal, there is provided a control... | 07/19/1983 |
| 4301704 | Electronic musical instrument An electronic musical instrument generates musical tone signals by digitally executing the calculations of equations representing frequency modulation. The instrument comprises a keyboard information generating circuit for generating key information conce... | 11/24/1981 |
| 4294153 | Method of synthesizing musical tones A method of synthesizing a musical sound in which a fundamental waveform signal is produced which has a zero crossing point within one cycle period thereof and the phase of the zero crossing point is modulated by a modulation signal to provide a musical t... | 10/13/1981 |
| 4253367 | Musical tone forming device by FM technology A musical tone forming device comprises circuit system of digital calculation realizing frequency modulation technology in three different modes. In the first mode a plurality of frequency modulated waveforms are individually calculated in response to key... | 03/03/1981 |
| 4249447 | Tone production method for an electronic musical instrument A method for producing a tone waveform having a desired spectral construction by modulating an input address signal of a selected frequency for a waveform memory. For the modulation of the input address signal, the output of the waveform memory is multipl... | 02/10/1981 |
| 4245542 | Method and apparatus for timbre control in an electronic musical instrument An electronic musical instrument is provided with a keyboard which may comprise one or more keyboard sections. Plural instrument voices are stored in memory for each section of the instrument keyboard. Each stored voice comprises a set of plural multiple ... | 01/20/1981 |
| 4244257 | Wave-shape generator for electronic musical instruments A wave-shape generator advantageously used for generation of various wave-shape signals on electronic musical instruments comprises, as a substitute for multiple wave-shape memories needed in the conventional wave-shape generators, a combination of a sing... | 01/13/1981 |
| 4212221 | Method and apparatus for note attack and decay in an electronic musical instrument The present invention is a two-part apparatus for producing note attack and decay in a conventional electronic musical instrument. Either part of the invention may be used independently of the other; however, at present the combined use is preferred. In p... | 07/15/1980 |
| 4201105 | Real time digital sound synthesizer Linearly binary-coded digital control signals representing specific time segments of musical sounds are used in part to control stepped ramp signal generators in a digital synthesizer which runs continuously on a fixed program. The ramp signals are used t... | 05/06/1980 |
| 4189970 | Method and apparatus for achieving timbre modulation in an electronic musical instrument In a digital musical instrument, timbre modulation is effected through the use of a digital magnitude comparator and associated digital logic. Selected note frequency signals and selected scale factors are compared in the digital magnitude comparator. Sel... | 02/26/1980 |
| 4175463 | Resonator for a musical tone synthesizer A tone synthesizer in which a musical tone of selected fundamental frequency is generated with a resonance effect at selected harmonics of the tone. The resonance effect is produced by adding an amplitude modulated carrier signal to the musical tone, the ... | 11/27/1979 |
| 4175464 | Musical tone generator with time variant overtones There is described a tone generator in which waveform amplitude data is generated from a table of sinusoid values in an addressable memory by changing the addresses as a function of time in a periodic or sinusoidal manner. The effect is to produce a seque... | 11/27/1979 |
| 4144789 | Amplitude generator for an electronic organ An amplitude curve generator for use with an electronic organ or the like to control the musical shape of an audible tone. The generator utilizes a simple binary down counter driven from a clock source to produce a sequence of decreasing binary numbers th... | 03/20/1979 |
| 4133242 | Waveshape memory type electronic musical instrument A waveshape memory type electronic musical instrument produces a tone signal by cyclically reading wave value samples of a tone waveshape stored in a waveshape memory. The electronic musical instrument comprises a function generator for generating a perio... | 01/09/1979 |
| 4116103 | Pulse width modulation in a digital tone synthesizer In a digital tone synthesizer, musical tones are created by evaluating a generalized Fourier transform of harmonic coefficients. Tones corresponding to pulse-like waveshapes are simulated by using harmonic coefficient values associated with a pulse wavesh... | 09/26/1978 |
| 4082028 | Sliding overtone generation in a computor organ Sliding overtone generation is implemented in a computor organ of the type disclosed in U.S. Pat. No. 3,809,786. In such an instrument, the sampled amplitudes of a musical waveshape are computed in real time by individually calculating the amplitude contr... | 04/04/1978 |
| 3972259 | Production of pulse width modulation tonal effects in a computor organ In a computor organ, musical tones are generated by separately evaluating the constituent Fourier components of a musical waveshape and summing these to obtain the waveshape sample point amplitudes. The relative amplitude contribution of each Fourier comp... | 08/03/1976 |
