说明：  用PC机扬声器演奏音乐 了解PC机扬声器系统的电路结构，学习扬声器发声的编程方法。 MUSIC是书中例子的源程序。 PIANO是用键盘模拟乐器。 使用方法：用数字键1、2、3、4、5、6、7、8 弹奏声音。8为高音1，按0为结束。 可改程序奏出更多的声音。
(Using PC-speaker music system to understand PC-speaker circuit structure, learning the programming method audible speaker. MUSIC is a book example of the source. PIANO analog instruments with a keyboard. Usage: use the numeric keys 1,2,3,4,5,6,7,8 play voice. 8 for the Treble 1, press 0 for the end. Procedures that can be produced more voices.)