用vc做的一个音频实时采集播放的程序，采用双缓冲机制-Vc do with a real-time audio broadcast of the program acquisition, use double buffering mechanism

使用vc++开发pc端usb应用软件实例，上传下载一个语音压缩文件，将该上传的文件转成wave格式，可实现pc播放-realize the usb application example.upload and download a file.which can convertSpeech compression file to*.wave format file.and play it in pc.