SHOUTcast is a streaming audio system for Windows and Unix platforms.
At the center of the system is this product, the SHOUTcast Distributed
Network Audio Server (DNAS).  The DNAS is responsible for accepting
a broadcast feed from Winamp and the SHOUTcast Source DSP plug-in, and
repeating the broadcast to listeners connected to this SHOUTcast DNAS.
Once your source content is being fed into the SHOUTcast DNAS, it will
also, dependent on the source content's configuration, list itself
with the SHOUTcast directory so listeners can locate your broadcast.

The DNAS also has the ability to deliver on-demand content in MP3
format stored in the content/ directory.

SHOUTcast is a product of Nullsoft, Inc, makers of the fantastically
popular Winamp audio player for Win32.  The SHOUTcast system relies on
Winamp for playback and content sourcing.  Winamp is available at
http://www.winamp.com