MPEG Audio Decoder

madplay
Developer(s)Robert Leslie
Initial release2000
Stable release
0.15.2b / February 23, 2004 (2004-02-23)
Repositorysourceforge.net/projects/mad/
Written inC
Operating systemLinux, FreeBSD, macOS
TypeMedia player
LicenseGPLv2
Websiteunderbit.com/products/mad/

MPEG Audio Decoder (MAD) is a GPL library for decoding files that have been encoded with an MPEG audio codec. It was written by Robert Leslie and produced by Underbit Technologies. It was developed as a new implementation, on the ISO/IEC standards.

It consists of libmad, a software library, and madplay, a command-line program for MP3 playback. libmad is notable for using only fixed-point arithmetic while madplay is notable for its ReplayGain support.

Development ended decades ago, and vulnerabilities identified since then have gone unpatched.