Call start to begin playback and drain to wait until the playback is complete, and close to release the audioline.
调用start开始播放，drain等待播放完成，close释放音频线路。
2
SD card reader and configure the USB interface, user can pass throw in audioline will be it with computers, music, play device to connect.
配置了SD读卡器及USB接口，用户可以通过附赠的音频线将它与电脑等设备连接，播放音乐。
3
Install the fireworks combinations at the site according to the assemble diagram, connect the audioline to the audio equipments, remember to connect the ignition plug.