红外遥控按下，4位LED数码管显示音乐的序号，并由喇叭演奏出相应序号的音乐，这里我们提供了12首的音乐，也就是序号从1到12，当我们按遥控器上面别的按键的时候，这时候系统要提示没有歌了，并显示错误的标志。相当于是一个midi播放器！-Infrared remote control is pressed, 4 LED digital tube display music, serial number, by the corresponding number of speakers playing music, where we provide 12' s music, that is, serial number from 1 to 12, when we press the remote control above the other keys when the system should be prompted at this time there is no song, and and display the wrong sign. The equivalent of a midi player!