基于51单片机和简单功率放大电路的音乐播放器程序，keil4环境下编译，可自添加曲目，自带两只蝴蝶等3首歌曲-51 And based on self power amplifier circuit is simple music player program, under keil4 compiler environment, can be customized to add tracks, comes with three songs, two butterflies