wince 平台实现播放wave流程序,开启pcm文件，播放数据流-wince platform can play the wave

单片机读取SD卡音乐直接利用SPWM波滤播放，在播放前需要将音频文件转化为PCM格式。-Microcontroller reads the SD card music playback directly use the SPWM wave filter in front of playing audio files need to be converted to PCM format.