Thanks Opio for the info.
Nullsoft Winamp is a fast, flexible, high-fidelity music player for Windows. Winamp supports MP3, CD, Audiosoft, Audio Explosion, MOD, WAV and other audio formats, custom appearances called skins, plus audio visualization and audio effect plug-ins. Version 3 includes many additional features including free-form skins, a new decoder, built-in cross fade, and an advanced Media Library.