MPEG-1 Audio Layer I

MP11MPEG-1/2 Layer-1PASCPrecision Adaptive Subband Coding
MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard.wikipedia
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MPEG-1 Audio Layer II

MP2MPEG-1 Layer IIMUSICAM
While supported by most media players, the codec is considered largely obsolete, and replaced by MP2 or MP3.
MPEG-1 Audio Layer II or MPEG-2 Audio Layer II (MP2, sometimes incorrectly called Musicam or MUSICAM) is a lossy audio compression format defined by ISO/IEC 11172-3 alongside MPEG-1 Audio Layer I and MPEG-1 Audio Layer III (MP3).

Digital Compact Cassette

DCCDDCdigital cassette
MPEG-1 layer I was also used by the Digital Compact Cassette format, in the form of the PASC audio compression codec.
PASC was later integrated into the ISO/IEC 11172-3 standard as MPEG-1 Audio Layer I (MP1).

MPEG-2

MPEG2H.222MPEG 2
MPEG-2 part 3 also defined additional bit rates and sample rates for MPEG-1 Audio Layer I, II and III.

Media player software

media playeraudio playervideo player
While supported by most media players, the codec is considered largely obsolete, and replaced by MP2 or MP3.

MP3

.mp3MP3 downloadMP3 files
While supported by most media players, the codec is considered largely obsolete, and replaced by MP2 or MP3.

Sub-band coding

sub-bandsub-band coderSubband
MP1 uses a comparatively simple sub-band coding, using 32 sub-bands.

MPEG-1

MPEG-1 Part 2MPGMPEG1
MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard.

S1 MP3 player

Chinese MP3 and MP4 players with a recording function, and voice recordersiPod" MP3

List of codecs

video codecsList of multimedia (audio/video) codecsaudio codec

FFmpeg

Advanced Audio Coding

AACAAC-LCMPEG-4 AAC
Therefore, MPEG-2 Part 7 is also known as MPEG-2 NBC (Non-Backward Compatible), because it is not compatible with the MPEG-1 audio formats (MP1, MP2 and MP3).

ISO/IEC base media file format

ISO base media file formatMPEG-4 Part 12ISO BMFF
Storage of MPEG-1/2 Audio (MP3, MP2, MP1) in the ISO/IEC base media file format was defined in ISO/IEC 14496-3:2001/Amd 3:2005.

Rockbox

Foobar2000

Foobar 2000foobar2000 media playerFPL
At its core, foobar2000 natively supports a range of audio formats, including MP1, MP2, MP3, MPC, AAC, WMA, Ogg Vorbis, FLAC / Ogg FLAC, ALAC, WavPack, WAV, AIFF, AU, SND, CD, Speex, and Opus.

Polyphase quadrature filter

polyphasedPQF
PQF filters are used in MPEG-1 Audio Layer I and II, Musepack (which was based on MPEG-1 layer II), in MPEG-1 Layer III with an additional MDCT, in MPEG-4 AAC-SSR for the 4 band PQF bank, in MPEG-4 V3 SBR

AIMP

AIMP can also play many other audio formats like Monkey's Audio (APE), Tom's lossless Audio Kompressor (TAK) and True Audio; DTS audio, MP1, MP2, Musepack, OptimFROG, WavPack, MIDI, Impulse Tracker, MO3, MOD, MultiTracker Module, S3M, and Fasttracker 2 Extended Module.

Digital Audio Tape

DATDATsDAT recorder
The DCC was cheaper and simpler mechanically than DAT, but did not make perfect digital copies as it used a lossy compression technique called PASC.

Comparison of video container formats

Comparison of container formatsComparison of (audio/video) container formatscontainer files