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用Qt creater开发的madplay 播放器前端QT4 GUI应用程序，运行于linux ARM9平台，实现播放、暂停、音量设置、上一曲、下一曲功能。-Qt creater developed madplay player front-end the QT4 GUI application program running on linux ARM9 platform, realized play, pause, volume settings, the last one, for a fu