mpg123

{{Short description|Open source audio player}}

{{lowercase|title=mpg123}}

{{Infobox software

| name = mpg123

| screenshot = mpg123.png

| author = Michael Hipp, Oliver Fromme

| developer = Thomas Orgis

| released = before 1999

| latest release version = {{wikidata|property|preferred|reference|edit|Q287021|P348|P548=Q2804309}}

| latest release date = {{wikidata|qualifier|preferred|single|Q287021|P348|P548=Q2804309|P577}}

| latest preview version = {{wikidata|property|preferred|reference|edit|Q287021|P348|P548=Q51930650}}

| latest preview date = {{wikidata|qualifier|preferred|single|Q287021|P348|P548=Q51930650|P577}}

| programming language = C, Assembly

| operating system = Unix-like, Windows

| genre = Audio player

| license = LGPL-2.1-only

| website = {{URL|//mpg123.org}}

| repo = {{URL|https://sourceforge.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){{Cite web | url=http://forums.winamp.com/showthread.php?p=3162548 | title=Winamp 5.8 Beta, Build 3660 (Official) - Winamp & Shoutcast Forums | date=19 October 2018 }} for MP3 playback and can be used in Winamp before version 5.8 via a plugin.{{Cite web|url=http://www.hydrogenaud.io/forums/index.php?showtopic=18530|title = Otachan's in_!mpg123}}