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    • 3. 发明授权
    • Musical sound generating system including pseudo-sinusoidal wave operator
    • 音乐发声系统包括伪正弦波算子
    • US5756919A
    • 1998-05-26
    • US845474
    • 1997-04-25
    • Masato AdachiJunichi Ikeuchi
    • Masato AdachiJunichi Ikeuchi
    • G10H7/08G10H1/06G10H5/10G10H1/08G10H5/02
    • G10H1/06G10H5/10Y10S84/10
    • A musical sound generating system not requiring a memory unit or interpolation device for generating a tone having a tone color including a large number of harmonic components. The tone is generated with few operations and ready predictability of tone color. The musical sound generating system includes an adder for phase modulating a carrier wave by adding modulating wave data to carrier wave phase angle data; a pseudo-sinusoidal wave operator for outputting a pseudo-sinusoidal wave in response to phase-modulated carrier wave phase angle data from the adder; and a multiplier for generating a tone signal by multiplying the pseudo-sinusoidal wave by amplitude coefficient data. The pseudo-sinusoidal wave operator controls modulation of the pseudo-sinusoidal wave in accordance with a function modulation coefficient that is supplied to the operator as an external parameter. The pseudo-sinusoidal wave operator may include an operator for generating a triangular wave, an operator for squaring the triangular wave, and an operator for producing a substantially sinusoidal wave from a combination of the triangular wave and the squared triangular wave.
    • 一种不需要存储单元或内插装置的音乐声音产生系统,用于产生具有包括大量谐波分量的音色的音调。 这种音调产生的操作很少,音色可以预测。 音乐声发生系统包括:加法器,用于通过将调制波数据加到载波相位角数据中来对载波进行相位调制; 用于响应于来自加法器的相位调制载波相位角数据输出伪正弦波的伪正弦波算子; 以及乘法器,用于通过将伪正弦波乘以振幅系数数据来产生音调信号。 伪正弦波操作器根据作为外部参数提供给操作者的功能调制系数来控制伪正弦波的调制。 伪正弦波算子可以包括用于产生三角波的算子,用于平方三角波的算子,以及用于从三角波和平方三角波的组合产生基本正弦波的算子。