- Codec ID: 0x0050
MPEG-1 Audio Layer II (MP2) is an audio codec defined by ISO/IEC 11172-3. An extension exists: MPEG-2 Layer II and is defined in ISO/IEC 13818-3. It is the predecessor of MP3.
Some useful information on MPEG Layer 2 (unreachable as of Dec 7th 2007)