一种音乐播放控制电路的设计

简谱是一种比较简单易学的音乐记谱法,数字简谱用不同的点和线段配合八个阿拉伯数字0～7构成音符,记录并表示千变万化的音乐曲子及其基本音乐元素。通过音乐播放控制电路的设计实例,比较详细地说明音乐播放控制电路在数字逻辑电路的实践应用。通过该设计介绍用频率信号驱动蜂鸣器演奏电子音乐的原理,使读者掌握模可变计数器的设计方法以及只读存储器（ROM）的应用。

Design of Control Circuit for Music Broadcasting

The numbered musical notation is a simple music notation. It consists of different points and line segments cooperating with Arabic numerals 0-7, and records and expresses ever changing musics and its basic elements. By the design instance of a music broadcasting control circuit, the actual application of the music broadcasting control circuit in the digital logic circuit is explained in detail. The principle of giving a instrumental performance with the frequency signal to drive a buzzer is presented to make readers to master the design mothod of the mode variable counter and the usage of the read-only-memory（ROM）.