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    • 17. 发明授权
    • Musical envelope-producing device
    • 音乐信封制作装置
    • US4437380A
    • 1984-03-20
    • US331077
    • 1981-12-15
    • Tetsuo Yamaguchi
    • Tetsuo Yamaguchi
    • G04G13/02G04G99/00G10H1/00G10H1/057G10H1/26G10H1/02
    • G10H1/26G10H1/0575
    • Disclosed is a musical envelope-producing device which may be employed for an electronic watch with a melody performance function. The musical envelope-producing device has a memory which stores musical performance data representing pitches and durations of notes; an address counter; a pitch divider which generates a frequency signal corresponding to the pitch data; a note control circuit which divides a duration corresponding to the duration data into eight time components and generates a predetermined division signal when the duration has elapsed; and an envelope circuit which produces a sound pressure signal which is sequentially attenuated in a stepped manner in response to the division signal and which synthesizes the sound pressure signal and the frequency signal.
    • 公开了一种可用于具有旋律演奏功能的电子手表的音乐制作装置。 音乐信号产生装置具有存储表示音高和音符持续时间的音乐演奏数据的存储器; 地址柜台 产生对应于音调数据的频率信号的音调分频器; 音符控制电路,其将与持续时间数据相对应的持续时间划分为八个时间分量,并且当持续时间已经过去时产生预定的分频信号; 以及产生声压信号的包络电路,该声压信号响应于分频信号而以阶梯式顺序衰减,并且合成声压信号和频率信号。