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| Number | Title | Issue Date |
| 4215617 | Musical instrument and method for generating musical sound Disclosed is a musical instrument and method for generating musical sound. Digital circuits produce a sequence of numbers which are converted to analog electrical signals which are periodically sampled to drive a conventional speaker. The digital circuits... | 08/05/1980 |
| 4205574 | Electronic musical instrument with variable pulse producing system An electronic musical instrument develops digital pulses corresponding to electronic waves that are subsequently converted to audio sound such as by means of a loudspeaker. The musical instrument is provided a source of master frequency generated binary r... | 06/03/1980 |
| 4202234 | Digital generator for musical notes In a generator of musical notes for use as an electronic organ or other instrument, particularly of keyboard type, a computer is programmed to provide control and data signals to external hardware in response to the selection of stops and keys. In respons... | 05/13/1980 |
| 4200021 | Electronic musical instruments which form musical tones by repeatedly generating musical tone waveform elements There is provided a first waveform generator which repeatedly generates a first waveform having a relatively short period in response to a first constant parameter, a second waveform generator responsive to a second constant parameter for generating a sec... | 04/29/1980 |
| 4178822 | Musical synthesis envelope control techniques The disclosure describes improved apparatus for synthesizing an audible note from its volume, attack-decay envelope and waveshape characteristics. By employing multiplying analog-to-digital converters, the characteristics can be rapidly generated and comb... | 12/18/1979 |
| 4177706 | Digital real time music synthesizer This disclosure pertains to a digitalized music synthesizer functioning in the real time domain to continuously update, in an asynchronous manner, a continuing approximation of a desired waveform by utilizing its memory of the recent history of the operat... | 12/11/1979 |
| 4177707 | Electronic music synthesizer A polyphonic electronic music synthesizer reproduces in real time complex sounds representative of musical instruments and other musical and non-musical sounds from an above-audio frequency signal. The synthesizer includes a sampling circuit for repetitiv... | 12/11/1979 |
| 4160404 | Electronic musical instrument An electronic musical instrument comprising a plurality of tone forming systems having mutually different tone production modes. One of such tone forming systems can produce a tone continuously while another of such systems can produce a tone intermittent... | 07/10/1979 |
| 4149440 | Polyphonic computer organ A polyphonic electronic musical instrument in which the complex signal delivered by the instrument is made up of successive samples. Each sample in the complex signal is the sum of the samples of the different harmonics of the various notes played, at the corr... | 04/17/1979 |
| 4142432 | Electronic musical instrument This invention relates to an electronic musical instrument which comprises a waveshape computation cycle, a waveshape transmission cycle and an envelope load output. In the waveshape computation cycle, a musical waveshape is obtained in the form of the ac... | 03/06/1979 |
| 4138915 | Electronic musical instrument producing tones by variably mixing different waveshapes An electronic musical instrument of a waveshape memory type comprising: a plurality of waveshape memories for storing waveshapes of different tone color, and means for variably mixing the outputs of the plurality of waveshape memories for generating tone ... | 02/13/1979 |
| 4135422 | Electronic musical instrument In an electronic musical instrument wherein waveshape F(x, y) is computed and the resultant waveshape is converted to a musical tone, computation of said waveshape F(x, y) is carried out in accordance with either one of the following equations: ##EQU... | 01/23/1979 |
| 4132140 | Electronic musical instrument by digitally calculating harmonics and coefficients In an electronic musical instrument, the amplitudes of respective partial components constituting a composite waveshape at successive sample points are produced, these amplitudes are multiplied, at regular time intervals individually by coefficients each ... | 01/02/1979 |
| 4131049 | Electronic musical instrument having memories containing waveshapes of different type A plurality of waveshape memories are provided for storing the sampled values of one cycle sinusoidal wave as the fundamental frequency, two cycle sinusoidal wave as the second harmonic, . . . and m cycle sinusoidal wave as the m-th harmonic and, in addit... | 12/26/1978 |
| 4103582 | Electronic musical instrument In an electronic musical instrument of the class wherein the amplitude samples of a tone at successive sampling points of musical tone waveform are calculated by independently calculating respective partials that constitute the musical tone waveform and t... | 08/01/1978 |
| 4082027 | Electronics musical instrument In this electronic musical instrument, two separate tone generators of different type each produce a tone corresponding to an actuated key switch. Advantageously, one of the tone generators is of the Fourier synthesis type. In the other tone generator, a ... | 04/04/1978 |
| 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 |
| 4036096 | Musical tone waveshape generator The invention is directed to a waveshape generator capable of producing a desired waveshape by previously storing basic amplitudes obtained by sampling one period of the waveshape at a coarse interval and calculating amplitudes with a fine interval betwee... | 07/19/1977 |
| 4033219 | Touch responsive control system for a keyboard electronic musical instrument Touch responsive control of note amplitude and harmonic content is achieved by providing each key with a touch responsive transducer. A set of attack/decay scale factors are accessed sequentially from a memory and used to establish the amplitude envelope ... | 07/05/1977 |
| 3994195 | Electronic musical instrument An electronic musical instrument capable of producing a multi-system tone source effect which is an effect providing a musical tone with naturalness and resulting from simultaneous playing of a tone of a proper pitch and a tone of a pitch slightly differe... | 11/30/1976 |
| 3992970 | Electronic musical instrument An electronic musical instrument capable of producing any desired combination of two tones of mutually different footage. According to the invention, such combination of tones can be produced from only two tone sources without providing tone sources of an... | 11/23/1976 |
| 3992971 | Electronic musical instrument An electronic musical instrument capable of producing a large number of harmonic contents with a small number of calculation circuits. A composite wave consisting of plural harmonics can be mathematically expressed as a multiplication of a factor includin... | 11/23/1976 |
