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. additional features including free-form skins, a new decoder, built-in cross fade, and an advanced Media Library. Winamp3 was a failure in terms of what it hoped to achieve, many users reverted back to Winamp 2 as it was faster and more recent versions included some of the features that 3.0 introduced.