FFt即快速傅里叶变换，可以在VC环境下进行编译，例如MFC，使用时需要改变其参数-fastFourier transform

VC 6.0平台上编写的语音时时对讲软件，上传的附件为源码，可根据自己需求修改，视频通讯的稍后给出-Written on VC 6.0 platform real-time voice intercom software, attachment upload the source code can be modified according to their needs, given later video communications