SHOUTcast Radio is a streaming audio solution which permits anyone to broadcast audio to listeners across the internet. You become your own radio station, but instead of relaying through radio waves, you broadcast through the internet.
Your listeners can tune in through any supported media player, such as Windows Media Player, Winamp, iTunes, RealPlayer, etc. Shoutcast supports MP3pro, aacPlus, and Nullsoft Video (NSV) formats.
For more on the history of SHOUTcast https://en.wikipedia.org/wiki/SHOUTcast