介绍了2种建立音频播放系统的方法：DirectSound技术以及直接调用低级音频设备。该系统基于RTP/RTCP实时协议控制音媒体流的传输，采用UDP作为传输层协议，在PC机+MS Windows OS系统上，实现了音频流

媒体播放器。-Introduces two kinds of methods to establish audio playback system: DirectSound technology and direct calls to low-level audio device. The system is based on RTP/RTCP protocol control real-time transmission of audio media stream, using UDP as the transport layer protocol in the PC+MS Windows OS systems, the implementation of the audio streaming media player.