MPEG-1 Audio Layer II - Naming and Extensions

Naming and Extensions

The term MP2 and filename extension .mp2 usually refer MPEG-1 Audio Layer II data, but can also refer to 'MPEG-2 Audio Layer II, a mostly backwards compatible extension which adds support for multichannel audio variable bit rate encoding, and additional sampling rates, defined in ISO/IEC 13818-3. The abbreviation MP2 is also sometimes erroneously applied to MPEG-2 video or MPEG-2 AAC audio.

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