本设计综合应用Windows低级音频API、G.729A编码算法、SOCKET编程、多线程编程等技术实现了在局域网PC机点对点的窄带全双工语音通信系统。界面通过MFC实现。为了确保发送应用层协议和聊天信息的正确性，采用TCP方式发送交互信息。语音模块的启动与关闭由交互的命令控制。考虑到语音数据需要延时小，这里用UDP方式发送。-The comprehensive application of the design of Windows low-level audio API of G.729A

本源代码功能，从udp socket 接收音频，然后通过声卡播放。可同时接收和播放多路音频。代码中有udp socket组播的编程，线程池的编程例子，音频播放的编程。-Source code function, receiving audio from udp socket, and then played through the sound card. Can receive and play multi-channel audio. Code has multicast udp socket