mpg123

mpg123
Original authorsMichael Hipp, Oliver Fromme
DeveloperThomas Orgis
Initial releasebefore 1997-04-27
Stable release
1.33.4  / 20 December 2025
Written inC, Assembly
Operating systemUnix-like, Windows
TypeAudio player
LicenseLGPL-2.1-only
Websitempg123.org
Repositorysourceforge.net/projects/mpg123/

mpg123 is a free and open-source audio player. It supports MPEG audio formats, including MP3.

As a console application, it has no graphical user interface.

mpg123's Assembly code is optimized with SIMD instructions to improve the performance of the iDCT part of the MPEG decoding.

mpg123's decoding library, libmpg123 is used by DeaDBeeF, Audacious, XMMS and Winamp (version 5.8) for MP3 playback and can be used in Winamp before version 5.8 via a plugin.