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    • 7. 发明授权
    • Electronic musical instrument for generating a natural musical tone
    • 用于产生自然音调的电子乐器
    • US4709611A
    • 1987-12-01
    • US841110
    • 1986-03-18
    • Yoshiyuki TakagiTetsuhiko Kaneaki
    • Yoshiyuki TakagiTetsuhiko Kaneaki
    • G10H1/057G10H7/04G10H1/08G10H7/00
    • G10H7/04G10H1/0575G10H2250/545
    • An electronic musical instrument includes a first waveform memory for storing a waveform corresponding to an attack portion of a musical tone and one period of a steady waveform produced after the attack, a second waveform memory for storing one period of a waveform different from the contents of the first waveform memory, a waveform reader which reads out the first and second waveform from the first and second waveform memory, respectively, and an envelope generator which generates two separate envelope signals. The first waveform including the attack portion of the musical tone and the periodic second waveform are multiplied by the separate envelope signals, respectively, and then the products of the multiplication are added together. The sum of the products is provided as an output. Thus, the electronic musical instrument is capable of precisely simulating the attack portions of musical tones of a natural musical instrument and generating musical tone signals having a steady part vividly simulating the musical tones of the natural musical instrument.
    • 电子乐器包括:第一波形存储器,用于存储对应于音调的攻击部分的波形和在攻击之后产生的稳定波形的一个周期的波形;第二波形存储器,用于存储与内容不同的波形的一个周期 第一波形存储器,分别从第一和第二波形存储器读出第一和第二波形的波形读取器以及产生两个分离的包络信号的包络发生器。 包括音调的攻击部分和周期性第二波形的第一波形分别乘以分离的包络信号,然后将乘法的乘积相加。 产品的总和作为输出提供。 因此,电子乐器能够精确地模拟自然乐器的乐音的攻击部分,并且生成具有生动地模拟自然乐器的乐音的稳定部分的乐音信号。