AT89s52单片机实现音乐播放功能，用户可更改程序-The controller is to do music SCM (STC89C51) as the core, combined with the components (LED digital tube, buzzer), then Proteus simulation software simulation successfully achieved and the time scheduled songs, play music after the countdown functions, to produce the effect of simple music controller device. The hardware part of the difficulty lies in the choice of components, layout, and welding.