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Summary
Name	MPEG Audio Stream Layer II
Version
Other names
Identifiers	MIME: audio/mpeg Library of Congress Format Description Identifier: fdd000338 PUID: fmt/198
Family
Classification	Audio
Disclosure
Description	MPEG Audio Stream Layer II is a lossy audio compression format defined by ISO/IEC 11172-3 standard. The format was initiated by the Digital Audio Broadcast (DAB) project financed by the European Union as a part of the EUREKA research program in the late 1980s. The format first appeared in early 1990s, with its encoding derived from the MUSICAM (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) audio codec, chosen for its simplicity and error resistance. It is a predecessor to MPEG 1/2 Audio Layer III and often referred to as MP2.
Orientation	Text
Byte order
Related file formats	Is previous version of MPEG 1/2 Audio Layer 3 Streaming Is supertype of MPEG 1/2 Audio Layer I
Technical Environment
Released
Supported until
Format Risk
Developed by	None.
Supported by	None.
Source	Digital Preservation Department / The National Archives
Source date	27 Oct 2009
Source description
Last updated	06 Oct 2022
Note	https://www.loc.gov/preservation/digital/formats/fdd/fdd000338.shtml https://en.wikipedia.org/wiki/MPEG-1_Audio_Layer_II https://www.w3.org/TR/mse-byte-stream-format-mpeg-audio/ http://www.library.snls.org.sz/archive/doc/wikipedia/wikipedia-terodump-0.1/tero-dump/wikipedia/mp/MP3.html