本程序实现音频文件的播放；单声道录音、立体声录音并保存为.wav文件；枚举系统中的声卡显示在下拉列表中供用户选择。

　　指定声道录音的功能我仍然没有实现，若有朋友知道实现方法敬请告知（chrys@163.com）我的实现方法是：先录制立体声的.wav文件，然后再将声道提取出来，分别保存为左声道的.wav文件和右声道的.wav文件，方法虽然笨，但也是没办法了。

-the program audio player; Mono audio, stereo recording and save. Wav file; Enumeration System of the card shows the drop-down list for users to select. Designated channel recording function, I still did not materialize, if my friends to know that this method Comments (chrys@163.com) I realize is : the first stereo recording. wav file and then re-channel extracted, kept separate from the left channel. wav files and the right channel. wav file, though stupid, but it is also not a solution.