用51单片机，汇编语言编写。功能是按下按键可以输出不同的音乐，音乐可以自己设置，数码管上会显示当前播放的是第几首歌。该工程文件在keil环境下编译，用proteus仿真通过。-using C language,　51 microcontroller. Function is to press the buttons can output different music, music can be set by yourself. LED DISPLAY will show the song which is currently play with. The project is compiled under keil environment, and pass proteus simulation.