MPEG Audio Layer I

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File Format
Name MPEG Audio Layer I
Ontology
Extension(s) .mp1
MIME Type(s) audio/mpeg, audio/MPA
PRONOM fmt/347
Released 1993

MPEG Audio Layer I, also known as MP1 (but not to be confused with MPEG-1), is a compressed audio format. There are two versions of it: MPEG-1 Audio Layer I and MPEG-2 Audio Layer I.

It is one of the standards defined in MPEG-1 Part 3 (ISO/IEC 11172-3), and in MPEG-2 Part 3 (ISO/IEC 13818-3).

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