An audio format is a medium for sound recording and reproduction. The term is applied to both the physical recording media and the recording formats of the audio content—in computer science it is often limited to the audio file format, but its wider use usually refers to the physical method used to store the data. Note on the use of analog compared to digital in this list; the definition of digital used here for early formats is that which is represented using discrete values rather than fluctuating variables. A piano roll is digital as it has discrete values, that being a hole for each key, unlike a phonograph record which is analog with a fluctuating groove.

Music is recorded and distributed using a variety of audio formats, some of which store additional information.

Year	Physical media formats	Recording formats
1805	Panharmonicon	Digital, automated sound reproducing machine.
1817	Apollonicon	Digital, automated sound reproducing machine.
1851	Piano Cylinder	Digital, automatically played by means of revolving cylinders
1857	Phonautograph	Earliest device known to record sound, invented by Édouard-Léon Scott de Martinville. While this device was capable of recording sound waves, they couldn't be played back.
1877	Tinfoil Phonograph	Analog; sound waveform transcribed to tinfoil
1883	Piano roll	Digital (vacuum-operated piano)
1886	Music Box disc	Digital (vacuum-operated music box)
Late 1880s	Brown Wax cylinder	Analog; vertical groove, vertical stylus motion - could be re-recorded
	Organ Cob	Mechanical digital (vacuum-operated organ)
	Ediphone, Dictaphone	Analog, the Ediphone and subsequent wax cylinders used in Edison's other product lines continued to be sold up until 1929 when the Edison Manufacturing Company folded.
1894	Pathé cylinder	Mechanical analog; vertical grooves, vertical stylus motion
1897	7'' 78rpm Record (Emile Berliner Patent)	Mechanical analog; lateral groove, horizontal stylus motion - made from hard rubber
1898	Wire recording	Analog; magnetization; DC bias
1901	10'' 78rpm Record	Mechanical analog; lateral groove, horizontal stylus motion - made from shellac
1902	Edison Gold Moulded Record	Mechanical analog; vertical groove, horizontal stylus motion - made from hard black wax - 160rpm standard - 100 threads per inch
1903	12'' 78rpm record	Mechanical analog; lateral grooves, horizontal stylus motion
	Phonograph Postcard	Mechanical analog; lateral groove, horizontal stylus motion
1905	Centre-start phonograph Record	Mechanical analog; lateral groove, horizontal stylus motion, starts from the centre of the disc
	Pathé disc	Mechanical analog; vertical groove, vertical stylus motion
1907	Indestructible Record	Mechanical analog; vertical groove, vertical stylus motion - made from black celluloid with cardboard and inner metal bands
1908	Amberol Cylinder Record	Mechanical analog; vertical groove, vertical stylus motion - made from hard black wax - 160rpm standard - 200 threads per inch
1912	Diamond Disc	Mechanical analog; vertical groove, vertical stylus motion - made from Bakelite or china clay
	Blue Amberol cylinder record	Mechanical analog; vertical groove, vertical stylus motion - made from blue celluloid with plaster of paris core - 160rpm standard - 200 threads per inch
1924	Electrical cut record	Mechanical analog; electrically cut from amplified microphone signal, lateral groove, horizontal stylus motion, discs at 7", 10", 12", most at 78 rpm[1]
1930	Filmophone flexible record	Mechanical analog; lateral groove, horizontal stylus movement - made from cellulose of various colours - 78rpm
	Durium Record or Hit of the Week Records	Mechanical analog; lateral groove - made from paper coated in a brown resin (Durium)
1930s	Reel-to-reel, magnetic tape	Analog; magnetization; AC "bias" dramatically increases linearity/fidelity, tape speed at 30 ips, later 15 ips and other refined speeds: 7+1⁄2 ips, 3+3⁄4 ips, 1+7⁄8 ips
	Electrical transcriptions	Mechanical analog; electrically cut from amplified microphone signal, high fidelity sound, lateral or vertical groove, horizontal or vertical stylus motion, most discs 16" at 33+1⁄3 rpm
1942	SoundScriber	Mechanical analog; vertical groove, 4–6 inch discs, it recorded sound by pressing grooves into soft vinyl discs
1947	Dictabelt (Memobelt)	Analog, medium consisting of a thin, plastic belt 3.5" wide that was placed on a cylinder and rotated like a tank tread, developed by the Dictaphone company in 1947
1948	Vinyl LP record (Columbia)	Analog, with preemphasis and other equalization techniques (LP, RIAA); lateral groove, horizontal stylus motion; discs 7", 10" and 12" at 33+1⁄3 rpm, 1st LP Columbia ML 4001 Milstein, Mendelssohn Violin Concerto
1949	Vinyl 45 record (RCA)	Analog 45 rpm vinyl 7" disk, first 45 pressed "PeeWee the Piccolo" RCA 47-0147 Indianapolis
1950	Tefifon	Electro–mechanical analog, vinyl belt housed in a cassette, used an embossing technique using a stylus to imprint the information, was the first thing to resemble a modern audio cassette
	16 2/3rpm vinyl record	Mechanical analog; lateral groove, horizontal stylus motion - played at half the regular speed of an LP
1951	Minifon P55	Analog, magnetic wire on reel, 30 cm/s or about 11.8 ips was quickly adopted by many governments as being the ultimate "spy" recorder of its day
1957	Stereophonic vinyl record	Analog, with pre-emphasis and other equalization techniques. Combination lateral/vertical stylus motion with each channel encoded 45 degrees to the vertical
	Dictet	Analog, 1⁄4 tape, 2.48 in/s, (3" reels housed 5.875 × 3 × .4375 inch cassette), developed by the Dictaphone Corp
1958	RCA tape cartridge (Sound Tape) (Magazine Loading Cartridge)	Analog, 1⁄4 inch wide tape (stereo & mono), 3+3⁄4 in/s & 1.875 in/s, one of the first attempts to offer reel-to-reel tape recording quality in a convenient format for the consumer market
1959	NAB Cart Tape (Fidelipac)	Analog, 1⁄4 inch wide tape in cartridge, 7+1⁄2 in/s & 15 in/s, Introduced in 1959 by Collins Radio, the cart tape format was designed for use by radio broadcasters to play commercials, bumpers and announcements
	Synchrofax Sound Paper	Magnetic coating on paper.
1962	4-Track (Muntz Stereo-Pak)	Analog, 1⁄4-inch-wide (6.4 mm) tape, 3+3⁄4 in/s, endless-loop cartridge
1962	Compact cassette	Analog, with bias. 0.15 inches (3.81 mm) tape, 1+7⁄8 ips. 1970: introduced Dolby noise reduction
1964	Sanyo Micro Pack 35 Channel Master 6546 Westinghouse H29R1	1⁄4 inch wide tape housed in a transparent cartridge measuring 2.6 × 2.9 × 1.9 inches, tape was stored on two reels residing atop one another, keeping the cartridge compact
1964	Sabamobil	A cartridge format for embedding and easy handling usual 3-inch-tape-reels with 1⁄4 inch tape, compatible to reel-to-reel audio recording in 3+3⁄4 ips.
1965	8-Track (Stereo-8)	Analog, 1⁄4 inch wide tape, 3+3⁄4 in/s, endless-loop cartridge
	DC-International cassette system	Analog cassette format introduced by Grundig, Telefunken and Blaupunkt: 120 × 77 × 12 mm cassette with 1⁄4 inch wide tape run at 5.08 cm per second.
1966	PlayTape	Analog, 1⁄8 inch wide tape, endless-loop cartridge, introduced by Frank Stanton
1969	Microcassette	Analog, 1⁄8 inch wide tape, used generally for note taking, mostly mono, some stereo (developed in the early '80s). 2.4 cm/s or 1.2 cm/s
	Minicassette	Analog, 1⁄8 inch wide tape, used generally for note taking, 1.2 cm/s
1970	Quadraphonic 8-Track (Quad-8) (Q8)	Analog, 1⁄4 inch wide tape, 3+3⁄4 in/s, 4-channel stereo, endless-loop cartridge
1971	Quadraphonic Vinyl Record (CD-4) (SQ Matrix)	Analog, introduced by CBS Records for matrix and RCA / JVC for CD-4 Recorded two tracks on both stereo channels, requiring a decoder to hear all four tracks. Despite this, the format is playable on any LP turntable.
1971	HiPac	Analog, a successor of the 1966 PlayTape, using tape width of the 1963 Compact Cassette, Japan only
1976	Dolby Stereo cinema surround sound	Analog
	Elcaset	Analog, name comes from "L-Cassette/Large Cassette"
1982	Compact Disc (CD-DA)	Digital. Linear PCM (LPCM)
1986	High Definition Compatible Digital (HDCD)	Digital. Redbook compatible physical CD containing 20–24 bit information (uses linear pulse-code modulation (LPCM))
1987	Digital Audio Tape (DAT)	Digital. This audio format famously caused controversy among recording companies when released due to the potential of perfect digital copies to increase piracy[2]
1988	AIFF (file format)	Digital. Audio Interchange File Format (AIFF)
1992	Digital Compact Cassette (DCC)	Digital, 1⁄8 inch wide tape, 1+7⁄8 in/s, introduced by Philips and Matsushita in late 1992, marketed as the successor to the standard analog compact cassette
	WAV (file format)	Digital. Named after the waveform created by a sound wave.
	Dolby Digital Cinema Sound	Digital. Also known as Dolby Stereo Digital until 1994.
	MiniDisc (MD)[3]	Digital. Adaptive Transform Acoustic Coding (ATRAC)
1993	DTS, SDDS, MP3 (file formats)	Digital. Digital Theatre System (DTS), Sony Dynamic Digital Sound (SDDS), MPEG-1 Audio Layer III (MP3)
1994	TwinVQ	Digital.
1995	RealAudio[3]
1997	DTS-CD	Digital. DTS audio
1998	WavPack (file format)	Digital. PCM, lossless compression (2002 hybrid compression) (2016 DSD support)
1999	DVD-Audio	Digital. Including Meridian Lossless Packing (MLP), Linear PCM (LPCM), Dolby Digital (AC-3) and Digital Theatre System (DTS)
	Super Audio CD (SACD)	Digital. Direct Stream Digital
	WMA (file format)	Digital. Windows Media Audio
	TTA (file format)	Digital. The True Audio Lossless Codec.
2000	FLAC (file format)	Digital. Free Lossless Audio Codec (open, non-proprietary, patent-and-royalty-free)
	Ogg Vorbis (file format)	Digital. Vorbis compressed audio format (open, non-proprietary, patent-and-royalty-free)
	DSDIFF (file format)	Digital. DSD, optional DST compression
	APE (file format)	Digital. Monkey's Audio
2001	AAC (file format)	Digital. Advanced audio coding
2002	WSD (file format)	Digital. DSD
2004	ALE or ALAC (file formats)	Digital. Apple Lossless
2005	DSF (file format)	Digital. DSD
2008	slotMusic	Digital. Usually at 320 kbit/s MP3 on microSD or microSDHC.
	Blu-spec CD	Digital. PCM
2012	Opus	Digital. Opus lossy audio coding format (IETF standard, open, non-proprietary, royalty-free)

• Timeline of video formats
• Format war
• Audio data compression

• History of Recording Technologies
• Museum Of Obsolete Media – Audio Formats