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

MP22II
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.
To compensate, DCC uses an audio compression codec based on MPEG-1 Audio Layer I (MP1) and termed PASC (precision adaptive sub-band coding).

MPEG-2

MPEG2DVDH.262 / MPEG-2 Part 2 video
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 playermedia players
While supported by most media players, the codec is considered largely obsolete, and replaced by MP2 or MP3.

MP3

.mp3MP3 downloadmp3s
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.

44,100 Hz

44.1 kHz44.1kHz44,100 samples per second
Sampling rates: 32, 44.1 and 48 kHz

MPEG-1

MPG.mpgMPEG-1 Part 2
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
MP1, MP2, MP3 and WMA playback

List of codecs

video codecsList of multimedia (audio/video) codecsaudio codec
layer I (MP1) (MPEG-1, MPEG-2 and non-ISO MPEG-2.5)

Winamp

Bento BrowserWinamp 5.58Winamp3
Playback formats: Winamp supports music playback using MP3, MIDI, MOD, MPEG-1 audio layers 1 and 2, AAC, M4A, FLAC, WAV, and WMA. Winamp was one of the first widely used music players on Windows to support playback of Ogg Vorbis by default. It supports gapless playback for MP3 and AAC and ReplayGain for volume leveling across tracks. CD support includes playing and importing music from audio CDs, optionally with CD-Text, and burning music to CDs. The standard version limits maximum burn speed and datarate; the "Pro" version removes these limitations. Winamp supports playback of Windows Media Video and Nullsoft Streaming Video. For MPEG Video, AVI, and other unsupported video types, Winamp uses Microsoft's DirectShow API for playback, allowing playback of most of the video formats supported by Windows Media Player. 5.1 Surround sound is supported where formats and decoders allow.

Advanced Audio Coding

AACAAC/AAC+/eAAC+.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 base media file format

ISO BMFFbase media formatISO-based
Storage of MPEG-1/2 Audio (MP3, MP2, MP1) in the ISO base media file format was defined in ISO/IEC 14496-3:2001/Amd 3:2005.

Rockbox

Rockbox Project.rockRockbox kernel
MPEG audio layers I-III (MP3/MP2/MP1)

Foobar2000

FPL
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

polyphased
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

CherryPlayer

aac, ac3, aif, aifc, aiff, alac, amr, au, caf, flac, m4a, m4b, m4p, m4r, mka, mp1, mp2, mp3, ogg, oma, ra, voc, wav, wma, wv

AIMP

AIMP3
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.

Combined Community Codec Pack

Audio codecs: MP1, MP2, MP3, AC3, DTS, AAC, Vorbis, LPCM, FLAC, TTA and WavPack