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公开(公告)号：US4351212A
公开(公告)日：1982-09-28
申请号：US141826
申请日：1980-04-21
申请人： Shimaji Okamoto , Yohei Nagai
发明人： Shimaji Okamoto , Yohei Nagai
CPC分类号： G10H7/06 , G10H2250/161
摘要： An electronic musical instrument comprises a note code producer for producing note codes respectively having n bits representing juxtaposed notes aligned by a semitone interval step. The note codes to be generated are selected from a binary code table consisting of successively aligned binary values corresponding to an order of alignment of the notes in a musical scale and the table omits either one of the largest and smallest values to be represented by the lowest m bits (n>m). A modified note code generator produces modified note codes by repetitively adding the lowest m bits of each note code to further lower order digits below the least significant bit of each note code, and a sound system generates musical tones having frequencies corresponding to the modified note codes.
摘要翻译： 电子乐器包括用于产生音符代码的音符代码生成器，分别具有表示以半音间隔步长对齐的并置音符的n位的音符代码。 要生成的音符代码从二进制代码表中选择，该二进制代码表由对应于音阶中的音符的排列顺序的连续排列的二进制值组成，并且该表省略了由最低值表示的最大值和最小值中的任一个 m位（n> m）。 经修改的音符代码生成器通过将每个音符代码的最低m位重复地添加到每个音符代码的最低有效位之下的更低位数字产生修改的音符代码，并且声音系统产生具有对应于修改的音符代码的频率的乐音 。
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公开(公告)号：US4383462A
公开(公告)日：1983-05-17
申请号：US64917
申请日：1979-08-08
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
CPC分类号： G10H1/0575 , G10H7/04
摘要： In an electronic musical instrument of the waveshape memory type including at least one waveshape memory for storing and reproducing sample values of a musical sound wave to be generated, the waveshape memory stores the sample values of the complete waveshape of a musical tone with a shaped envelope.
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公开(公告)号：US4301704A
公开(公告)日：1981-11-24
申请号：US901798
申请日：1978-05-01
申请人： Yohei Nagai , Tetsuo Nishimoto , Shimaji Okamoto
发明人： Yohei Nagai , Tetsuo Nishimoto , Shimaji Okamoto
摘要： 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 concerning depressed key numbers and key touch information concerning key operation, a plurality of system parameter generating circuits for providing parameter information in response to the outputs of a tone color selecting switch section, a plurality of system musical tone signal forming sections each for producing musical tone signals through the digital calculation of the FM equation in accordance with the abovementioned informations, and a musical tone generating section for producing musical tones by combining the musical tone signals provided by the musical tone signal forming sections, the musical tone signal forming sections calculating the FM equation by using different parameters provided by the parameter generating circuits. The produced musical tone signals contain partials of inharmonic relations and are rich in partials, to realize naturalness.
摘要翻译： 电子乐器通过数字执行表示频率调制的等式的计算来产生乐音信号。 该仪器包括：键盘信息产生电路，用于产生关于按键操作的按键数目和键触摸信息的键信息;多个系统参数产生电路，用于响应音调选择开关部分的输出提供参数信息，多个 用于通过根据上述信息的FM等式的数字计算产生乐音信号的系统乐音信号形成部分;以及乐音产生部分，用于通过组合由乐音信号提供的乐音信号来产生乐音 形成部分，乐音信号形成部分通过使用由参数发生电路提供的不同参数来计算FM方程。 产生的音调信号包含部分不和谐关系，并且部分分散，以实现自然。
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公开(公告)号：US4763553A
公开(公告)日：1988-08-16
申请号：US783092
申请日：1985-10-02
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
CPC分类号： G10H1/0575 , G10H7/04
摘要： In an electronic musical instrument of the waveshape memory type including at least one waveshape memory for storing and reproducing sample values of a musical sound wave to be generated, the waveshape memory stores the sample values of the complete waveshape of a musical tone with a shaped envelope.
摘要翻译： 在包括用于存储和再现要产生的音乐声波的采样值的至少一个波形存储器的波形存储器类型的电子乐器中，波形存储器存储具有成形信封的音调的完整波形的采样值 。
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5.发明授权Electronic musical instrument producing tones by variably mixing different waveshapes 失效电子乐器通过可变地混合不同的波形来产生色调
公开(公告)号：US4138915A
公开(公告)日：1979-02-13
申请号：US773788
申请日：1977-03-02
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
CPC分类号： G10H1/14 , G10H1/053 , G10H7/04 , G10H2250/161
摘要： 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 signals of varying tone color. The mixing ratio of the different waveshapes may be varied with the lapse of time or according to the touch of the key operation or to the tone pitch.
摘要翻译： 一种波形存储器类型的电子乐器，包括：用于存储不同音色的波形的多个波形存储器，以及用于可变地混合多个波形存储器的输出的装置，用于产生变化色调的音调信号。 不同波形的混合比可以随着时间的流逝或根据键操作的触感或音调而变化。
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公开(公告)号：US4135424A
公开(公告)日：1979-01-23
申请号：US769303
申请日：1977-02-16
申请人： Shimaji Okamoto
发明人： Shimaji Okamoto
摘要： A fully digitalized function-of-time generator suitable for use as a tone envelope generator in a digital electronic musical instrument, comprising: a clock pulse generator for generating a clock pulse at a selectable rate; a gate enabled at each arrival of the clock pulse; a single-stage binary shift register for successively shifting out its contents as a digital word representing the instantaneous values of a desired function of time synchronously with the clock pulse; a digital subtractor; a digital multiplier; and a digital adder, all of these members being interconnected to each other to be operative so that the output of the register is subtracted from a first set value representing a digital word, the resulting difference being multiplied by a second set value representing a digital word, the resulting product being added to the output of the register via the gate, so that the resulting sum is loaded into the register. Thus, the contents of the register approaches progressively toward the first set value, and finally becomes in agreement therewith. Thus, this musical instrument can produce a musical tone rich in expression and imparted with desired tone envelope characteristic, by appropriate choice of one or more of the first and the second values and the rate of the clock pulse.
摘要翻译： 一种适用于数字电子乐器中的音频包络发生器的完全数字化的时间函数发生器，包括：时钟脉冲发生器，用于以可选择的速率产生时钟脉冲; 每个到达时钟脉冲使能门; 单级二进制移位寄存器，用于连续移出其内容，作为表示与时钟脉冲同步的期望时间功能的瞬时值的数字字; 数字减法器 数字乘法器 和数字加法器，所有这些构件彼此互连以使其工作，使得从表示数字字的第一设定值中减去寄存器的输出，所得到的差被乘以表示数字字的第二设定值 ，所得到的乘积通过门被添加到寄存器的输出，使得所得到的和被加载到寄存器中。 因此，寄存器的内容逐渐朝向第一设定值，最终变得与其一致。 因此，该乐器可以通过适当选择第一和第二值中的一个或多个以及时钟脉冲的频率，产生丰富的表达并赋予所需音调包络特性的乐音。
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公开(公告)号：US4133242A
公开(公告)日：1979-01-09
申请号：US773787
申请日：1977-03-02
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
摘要： 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 periodic function signal which includes the mathematical product of an amplitude term varying as a function of time and a cyclic term of a selected frequency, and a multiplier for modulating a part of the tone waveshape by the periodic function signal, thereby producing a musical tone signal changing in waveshape as time lapses.
摘要翻译： 波形记忆型电子乐器通过循环读取存储在波形存储器中的乐音波形的波值样本来产生音调信号。 电子乐器包括用于产生周期性功能信号的函数发生器，其包括作为时间的函数变化的幅度项和所选频率的循环项的数学乘积，以及用于通过以下方式调制一部分音调波形的乘法器： 周期性功能信号，从而产生随时间流逝波形变化的乐音信号。
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公开(公告)号：US4967635A
公开(公告)日：1990-11-06
申请号：US186462
申请日：1988-04-26
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
CPC分类号： G10H1/0575 , G10H7/04
摘要： In an electronic musical instrument of the waveshape memory type including at least one waveshape memory for storing and reproducing sample values of a musical sound wave to be generated, the waveshape memory stores the sample values of the complete waveshape of a musical tone with a shaped envelope.
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9.发明授权Electronic musical instrument having memories containing waveshapes of different type 失效具有包含不同类型的波形的记忆的电子乐器
公开(公告)号：US4131049A
公开(公告)日：1978-12-26
申请号：US729690
申请日：1976-10-05
申请人： Takatoshi Okumura , Shimaji Okamoto
发明人： Takatoshi Okumura , Shimaji Okamoto
CPC分类号： G10H7/105
摘要： 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 addition thereto, of harmonic-abundant complex waves such as a triangular wave, a sawtooth wave and a rectangular wave. These waveshape memories are read at the same reading rate. The read out sinusoidal waves and triangular, sawtooth and rectangular waves are controlled in their relative levels in accordance with the tone-color of an intended musical tone wave shape. The sinusoidal waves and the triangular, sawtooth and rectangular waves are thereafter synthesized to produce a desired tone-color wave shape. Since the triangular, sawtooth and rectangular waves contain abundant harmonic components, many kinds of musical tones containing abundant harmonic components can be produced despite a limited number of waveform memories.
摘要翻译： 提供了多个波形存储器，用于存储作为基频的一个周期正弦波的采样值，作为二次谐波的两个周期的正弦波。 。 。 并且将周期正弦波作为m次谐波，并且除此之外还包括诸如三角波，锯齿波和矩形波之类的谐波丰富的复数波。 这些波形存储器以相同的读取速率读取。 读出的正弦波和三角形，锯齿波和矩形波根据预期乐音波形的色调被控制在它们的相对电平。 此后，合成正弦波和三角形，锯齿波和矩形波以产生所需的色调波形。 由于三角形，锯齿波和矩形波都包含丰富的谐波分量，尽管波形存储器数量有限，但是可以产生包含丰富的谐波分量的多种音调。
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公开(公告)号：US4974485A
公开(公告)日：1990-12-04
申请号：US507948
申请日：1983-06-24
申请人： Yohei Nagai , Shimaji Okamoto
发明人： Yohei Nagai , Shimaji Okamoto
CPC分类号： G10H1/0575 , G10H7/04
摘要： In an electronic musical instrument of the waveshape memory type including at least one waveshape memory for storing and reproducing sample values of a musical sound wave to be generated, the waveshape memory stores the sample values of the complete waveshape of a musical tone with a shaped envelope.
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