mp4 c 语言的源程序供参考 在写单片机程序可以调用此头文件-mp4 language source for information in writing SCM procedures can call this first document

简单的电子琴程序，利用51单片机装入该程序即可使用。几首简单儿歌-Simple piano program, the use of 51 single-chip loading, the program can use. A few simple nursery rhymes