cold.fyi/The Groove

A1 · about 18 min · updated November 2026

A short history of the record

The short version: This section follows the record from tinfoil cylinders in 1877 through shellac 78s to Columbia's vinyl LP in 1948 and RCA's 45 in 1949, which split the market into albums and singles. Cassettes and then CDs pushed vinyl to a rounding error by the mid-2000s. Since then US vinyl has grown 19 years in a row, passing $1 billion in revenue in 2025.

Who made the first record?#

Thomas Edison developed the phonograph in 1877 while working on telegraph and telephone equipment; the first machine recorded onto a metal cylinder wrapped in tinfoil, which wore out after a few playings.1 A diaphragm moved by the voice made a stylus vibrate up and down, pressing a track into the foil. Edison got there by reversing the process of the phonautograph, a device about 20 years older that could trace sound but not replay it, and the Smithsonian calls his machine "the first instrument ever to record and play back sound."2

The often-cited August 12, 1877, is probably too early: historians think the first working recording came later, because the patent application was not filed until December 24, 1877.1 The Edison Speaking Phonograph Company was set up on January 24, 1878, to exhibit the machine, and the patent issued on February 19, 1878.1 Paid demonstrations followed that spring and summer, and in April 1878 Edison licensed it as an office dictation machine. Sales were poor, production stopped, and Edison did not come back to it until 1888, with 17 new patent applications.2

In the gap, others improved it. C. Bell and Tainter, as the Library of Congress credits them, swapped tinfoil for wax, patenting their graphophone on May 4, 1886. Edison adopted wax cylinders too, forming the Edison Phonograph Company on October 8, 1887, and selling an "Improved Phonograph" by May 1888.1

The first words on that first 1877 recording were the opening of the nursery rhyme "Mary Had a Little Lamb," according to ASME.3

Did the cylinder or the disc win?#

The disc won, and Edison eventually said so with his product line. Emile Berliner received his gramophone patent on November 8, 1887, moving from cylinders to what the Library of Congress calls "flat, double-sided zinc discs with spiral grooves." The case for the flat disc was industrial: it could be mass-produced far more cheaply than a cylinder.4

Berliner's early discs were a materials lab. The Library of Congress lists experimental zinc discs and very rare celluloid and rubber ones, but most surviving Berliners were pressed from a shellac compound by two outside firms, the Duranoid Company and the Burt Company. The earliest known list of Berliner records is a scrapbook page dated November 1, 1894, and production stopped in 1900.5 That year a court injunction shut the Berliner Gramophone Company of Philadelphia; Berliner passed his patent rights to Eldridge Johnson, who formed the Victor Talking Machine Company, with Berliner keeping a financial interest.4

Edison announced the Edison Disc Phonograph in 1913, conceding that the public preferred discs. He kept making Blue Amberol cylinders anyway, right up to the company's end in 1929.1

Cylinder Disc
Inventor Edison, 1877 (tinfoil); wax from 1886 to 1888 Berliner, patent 1887
Groove motion Up and down, into the surface Side to side6
Copying Harder to mass-produce Pressed cheaply from a master
End Edison's last cylinders, 1929 Still pressed today

What were 78s made of, and why do they shatter?#

A shellac 78 is mostly rock dust held together by bug resin. The shellac compound was the resin plus fillers, typically clay, slate or limestone, with carbon black for color and cotton fibers for strength.7 "Shellac 78s were produced commercially from 1897 until the late 1950s," per the University of Illinois preservation guide, with use declining steadily after World War II.7

The name 78 promises more consistency than the era delivered. Speeds varied (the same guide lists 30, 70 or 78 rpm), and common sizes were 7, 10, 12 and 16 inches.7 The Internet Archive's Great 78 Project puts it flatly: "During the 78rpm era there were no standards for speed, stylus size, or record/playback equalization." Its transfer engineer plays every disc at 78.26 rpm, a long-standing trade convention.8 Pre-1948 discs mostly have wide coarse grooves; the microgroove records that followed carry nearly twice as many grooves.7

How long 78s hung on depended on the country. In Japan, according to Japanese 78 experts relayed on a professional archivists' mailing list, the last new-issue 78s came out in 1958 and reissue pressings continued until production ceased in 1962.9 Treat those dates as reported rather than documented.

The last US-issued 78 is claimed to be Chuck Berry's "Too Pooped to Pop" on Chess, released in February 1960, though later ones were almost certainly released on small labels.10 The same history site reports, citing one source, that EMI deleted 78s from its catalogs in 1962, and says 78 sales were "virtually gone in the US and western Europe by about 1960."10

When did the LP come out?#

In June 1948, at a press event at the Waldorf Astoria in New York, Columbia unveiled the long-playing record. The exact day depends on who you ask: the Library of Congress gives the announcement as June 21, 1948, while a commenter on the same Library of Congress post, citing Billboard from 1948, and the researcher Matsubayashi Kohji's microgroove.jp both give June 18.11

The engineering came first. Peter Goldmark led the Columbia team that perfected the microgroove in the summer of 1947. The first LP catalog number, ML 4001, was the Mendelssohn Violin Concerto with Nathan Milstein and the New York Philharmonic under Bruno Walter. Early sides held about 23 minutes; Columbia's 1949 catalog claimed "up to 45 minutes of music on one 12-inch record," made of "nonbreakable Vinylite."11 There was history behind the gamble: Columbia's president, Edward Wallerstein, had earlier halted RCA Victor's failed long-playing disc of the early 1930s.11

The material change mattered as much as the groove. Plastic discs, made of polyvinyl chloride or polystyrene with stabilizers, were developed in the late 1940s and are still the format in use.7

Why are records 33 1/3 and 45?#

Because two companies fought for two years and both won. On January 9, 1949, Columbia announced a 7-inch single at 33 1/3. The next day, January 10, RCA Victor introduced its own 7-inch at 45 rpm, code-named "Madame X," with a dedicated changer; the big center hole allowed a smaller changing mechanism.12 RCA also claimed the 45 used less vinyl compound per pressing.12

This was the war of the speeds, and the rest of the industry had to choose. In August 1949 Decca went with the LP and Capitol went with all three speeds. In April 1950 RCA began issuing LPs, and in August 1950 Columbia began issuing 45s.12 The settlement, per Matsubayashi's history, was no single winner: the LP became the album, the 45 became the single.12 The formats section covers the sizes and speeds in use today.

Format Launched by Year Size Job it ended up doing
78 Many makers from 1897 7 to 16 in. Everything, until the 1950s
LP, 33 1/3 rpm Columbia 1948 12 in. The album
45 rpm RCA Victor 1949 7 in., large hole The single

What is the RIAA curve, and why does it still matter?#

Every record is cut with the bass turned down and the treble turned up, and every phono preamp undoes it. That deliberate tilt is an equalization curve: cutting less bass keeps the groove from swinging too wide, and boosting treble lifts it above surface noise; playback reverses both. Before 1954 every label could pick its own. Columbia's LP used a curve close to the 1942 NAB standard, and RCA's 45 used its "Old Orthophonic" curve, and the mess helped build support for one standard.12

The RIAA curve was approved by the RIAA Technical Committee, with chief engineers of five major US labels, on January 29, 1954, and circulated formally by June 1954.13 Matsubayashi calls it "essentially identical" to RCA Victor's New Orthophonic curve, already in use, and kept the 75-microsecond high-frequency setting from the June 1953 NARTB standard, which had replaced NAB's 100 microseconds of 1942.13

Adoption was not instant. Radio News reported in July 1954 that RCA Victor, Columbia, Capitol (already using it), London (recutting its back catalog), Decca and MGM (future releases) and Mercury were on board, while Westminster stayed with NAB for the time being.13 So a record cut before its label switched was not necessarily cut to the curve a modern phono stage assumes.

Outside the US, per Matsubayashi's history, the British standard BS 1928:1955 adopted characteristics identical to RIAA in 1955.14 Germany took longer: DIN 45536/45537 of 1959 used a CCIR-based curve with RIAA's bass turnovers but 50 microseconds of treble pre-emphasis, and in 1962 CCIR and DIN moved to 75 microseconds, making the curve identical to RIAA.14

When did stereo records come out?#

The stereo LP is a two-channel trick inside a single groove (the playing section explains how a stylus reads it), and it went from a lab to an American standard in under six months. Westrex's experimental 45/45 cutter, which carves the left and right channels on the two walls of one groove, each at 45 degrees, dates to July 12, 1957. It was shown to engineers at Westrex's Hollywood lab on August 26, demonstrated at the Audio Engineering Society's ninth convention in New York on October 11, and formally adopted by the Record Industry Association of America as the US standard on December 27, 1957, according to a 1975 account by the former Westrex recording equipment manager.15

The first single-groove stereo demo disc reached the public by mail. Audio Fidelity's AFLP 1872 came from masters Westrex cut in October 1957, and in mid-December the label advertised in Billboard that it would send a copy to anyone who wrote on company letterhead; Copper Magazine puts the pressing at 500 copies.16 Stereo itself was older than the groove: Alan Blumlein's stereo patent applications at EMI date to 1931, and Emory Cook issued stereo reel-to-reel tape in 1951 and later two-groove stereo discs that needed two cartridges to play.16

Per Wikipedia, the first four stereo discs available to the general public were released by Audio Fidelity in March 1958, and the label had four more out by the end of that month.17

When did vinyl die?#

It never quite did, but it came close. In US dollar terms, per RIAA data compiled by the archivist Richard Hess, the LP and EP peaked at 62.7% of the market in 1977. Cassettes passed them in 1983 (47.8% against 44.6%) and reached 55.3% in 1985. CDs went from 0.5% in 1983 to 95.5% at their peak in 2002. The LP and EP fell to 1.1% in 1990 and stayed below 0.3% from 1992 to 2007.18

In units, RIAA shipments show total vinyl more than halving between 1984 and 1988. In 1991 the US shipped 22 million vinyl singles and 4.8 million LPs and EPs; by 1995 it was 10.2 million singles and 2.2 million LPs and EPs. LP shipments had a small 1990s high of 3.4 million in 1998, then fell to 900,000 in 2006, the bottom; vinyl singles bottomed at 300,000 in 2009.19 The other US tracker, SoundScan (now Luminate), which counts sales to consumers rather than shipments, put the low a year earlier, at 857,000 vinyl albums in 2005.19 Worldwide, IFPI figures reported by SPIN fall from 450 million vinyl albums in 1989 to 3 million in 2006.19 In the UK, just over 200,000 LPs were bought in 2007, per BPI figures.20

The factories went with the sales. After the CD arrived, major labels sold, scrapped and dismantled pressing machines, the AP reported in 2022.21 Around 2015 NPR counted about 16 US plants still running, with the largest operating 28 presses and buying used ones from closed plants as far away as Italy.22

How did the revival start?#

Part of it was a holiday invented by shop owners. Record Store Day was conceived in September 2007; the idea was presented by Eric Levin of Criminal Records, modeled partly on Free Comic Book Day, with Michael Kurtz and Carrie Colliton among the co-founders. The first one was held in April 2008, launched with Metallica signing at Rasputin Music.23

The counting is the clearest part of the story. The RIAA's 2025 year-end report describes "19 YEARS of vinyl growth" in the US, which puts the turn right around the 2006 low.24 Demand outran the rebuilt factories: by 2022 the AP counted about 40 US plants, mostly small, backlogs of six to eight months, and only a handful of companies worldwide making presses, "none in the U.S."21

Is vinyl outselling CDs?#

In the US, yes, by money since 2020 and by units since 2022. In the UK, by money since 2022, but not by units as of the latest full count. The figures below are official industry numbers unless marked; RIAA counts label shipments and revenue; BPI counts consumer sales from Official Charts Company data.

Year Where Vinyl CD Note Source
2007 UK just over 200,000 LPs - BPI, reported 20
2016 UK 3.2M LPs (+53%) - Most since 1991; BPI, reported 20
2020 US $626M (+28.7%) $483M (-23%) Vinyl passes CD by revenue, first since 1986; RIAA, reported 25
2022 US 41M units; $1.2B (+17%) 33M units Vinyl passes CD by units, first since 1987; 70% of physical revenue; RIAA, reported 26
2022 UK £150.5M (+11%) £124M (-17.4%) Vinyl passes CD by retail value, first since 1987; ERA preliminary 27
2024 US $954.4M; 43.4M units $338.9M; 33.3M units RIAA, official 24
2024 UK 6.7M LPs (+9.1%) 10.5M (-2.9%) 17th straight vinyl rise; BPI, official 28
2025 US $1,042.9M (+9.3%); 46.8M units (+7.9%) $312.4M (-7.8%); 29.5M units (-11.6%) RIAA, official 24
2025 UK 7.6M LPs (+13.3%) not given 18th straight vinyl rise; BPI 29

A few details in that table carry the story. In the US in 2025, total physical revenue was $1,381.0 million, so vinyl was roughly three-quarters of it (75.5% by this guide's arithmetic on the RIAA figures), in a year when total US recorded-music wholesale revenue hit a record $11.5 billion.24 Music Week reported that 2025 was the first year vinyl passed $1 billion since 1983; that milestone is Music Week's framing, not a line in the RIAA document.30 Luminate, counting consumer purchases rather than shipments, put 2025 US vinyl album sales at 47.8 million against 33.8 million CD albums, the most purchased physical format.31 In the UK, 2024 was the first year physical album sales rose since 1994,28 and the top vinyl album of 2025 was Taylor Swift's The Life of a Showgirl, at over 147,000 copies.29

The newest numbers add a twist. In the first half of 2026 the RIAA reported US vinyl revenue up 17.7% and CD revenue up 58.6%, with physical overall up 25.9%; the mid-year release gave growth rates but not dollar or unit totals.32

Timeline

77 dates, cylinder to comeback

  1. 1877Edison's tinfoil phonograph The first machine to record and play back sound; patent application filed December 24, 1877. source
  2. 1887-11-08Berliner patents the gramophone Flat, double-sided discs with spiral grooves, cheaper to mass-produce than cylinders. source
  3. 1897Commercial shellac 78s begin Shellac discs are produced commercially from 1897 until the late 1950s. source
  4. 1913Edison switches to discs Edison announces the Edison Disc Phonograph, conceding the public prefers discs; cylinders continue until 1929. source
  5. 1921Scully builds a lathe John J. Scully builds a weight-driven disc lathe. source
  6. 1931Neumann AM31 Neumann's first lathe, the AM31, arrives. source
  7. 1939Cage uses records as an instrument John Cage's Imaginary Landscape No. 1 uses records switched between speeds. source
  8. 1946Ortofon cutter head Ortofon makes its first moving-coil cutter head. source
  9. 1946US press-parts supplier starts out Record Products of America begins supplying the record industry; it later sells parts for legacy presses. source
  10. 1948The hot stylus William S. Bachman at Columbia develops the heated cutting stylus. source
  11. 1948-06Columbia unveils the LP Announced at the Waldorf Astoria in New York; the Library of Congress gives June 21, other sources June 18. source
  12. 1949-01-10RCA Victor introduces the 45 A 7-inch 45 rpm single with a large center hole, the day after Columbia announced a 7-inch 33 1/3 single. source
  13. 1950Variable pitch at Scully Per Wikipedia, Scully introduces variable pitch, automated in 1955. source
  14. 1950The war of the speeds ends in a split RCA issues LPs in April and Columbia issues 45s in August: LP for albums, 45 for singles. source
  15. 1951First record pressed at Loděnice The state-run Gramofonové závody near Prague, later GZ Media, presses its first record. source
  16. 1951First record pressed at Lodenice The plant that became GZ Media, later described as the world's largest, presses its first record. source
  17. 1954RIAA curve standardized The RIAA equalization curve replaces a mix of competing EQs, after the 1953 NARTB standard. source
  18. 1954-01-29RIAA curve approved The RIAA Technical Committee approves one US playback equalization standard, still in use. source
  19. 195745/45 stereo cutter head Per Wikipedia, Western Electric/Westrex demonstrates the first commercial 45/45 stereo cutter head. source
  20. 1957-12-27Stereo standard adopted The RIAA adopts the Westrex 45/45 single-groove stereo system as the US standard. source
  21. 1957-12-2745/45 becomes the US stereo standard The Record Industry Association of America adopts the Westrex 45/45 stereo disc system as the American standard. source
  22. 1963Capitol's IAM triangle Capitol's Scranton plant marks records with IAM in a triangle, roughly 1963 to 1973. source
  23. 1964IEC 98 published The IEC disc recording standard that includes the RIAA curve is first published. source
  24. 1968RCA record-wear study Woodward and colleagues at RCA publish an electron-microscope study of groove wear in JAES. source
  25. 1968Porky starts cutting George Peckham starts as a cutting engineer at Apple in London. source
  26. 1970Neumann VMS 70 Neumann's VMS 70, which Pspatial Audio calls the world's most popular recording lathe. source
  27. 1970Rounder Records founded in Somerville Bill Nowlin, Ken Irwin and Marian Leighton Levy start the roots label in an apartment. source
  28. 1972-10Technics SL-1200 launched Matsushita launches the direct-drive SL-1200 under the Technics brand. source
  29. 1975Scratching discovered (dates disputed) KEXP dates Grand Wizzard Theodore's discovery of scratching to 1975; other sources say 1977, the early 1980s or the early 1970s. source
  30. 1976-09IEC adds a fourth time constant The IEC adds a 7950 microsecond infrasonic roll-off to the RIAA curve. source
  31. 1977Peak plastic for US recorded music The US recording industry uses an estimated 58 million kg of plastic (academic estimate). source
  32. 1979SL-1200MK2 Technics releases the MK2, which it bills as the first turntable developed for discos. source
  33. 1980Neumann VMS 80 Neumann's last lathe line, the first without the traditional bed, with DC servo motors. source
  34. 1982DMM arrives Teldec and Neumann's Direct Metal Mastering spreads in the early 1980s, cutting straight into copper. source
  35. 1983Cassettes pass LPs Cassettes take 47.8% of US dollar value against 44.6% for LPs and EPs. source
  36. 1985DMC championships begin The DMC World DJ Championships start. source
  37. 1989Last VMS-82 DMM lathe The last Neumann VMS-82 DMM lathe is assembled in Berlin. source
  38. 1995'Turntablism' coined DJ Babu of the Beat Junkies coins the word turntablism. source
  39. 2000-11Discogs launches Kevin Lewandowski starts Discogs. source
  40. 2001Final Scratch released Stanton's Final Scratch, the first DVS software sold publicly per Wikipedia, comes out late in the year. source
  41. 2004Serato Scratch Live Serato Scratch Live is released with Rane. source
  42. 2005US loses its last DMM room Per Wikipedia, the last public DMM facility in the US closes. source
  43. 2005Last US DMM room closes Per Wikipedia, the US loses its last DMM facility; a Discogs profile lists DMM cutting at Masterdisk, so this is disputed. source
  44. 2006US vinyl hits bottom RIAA LP and EP shipments fall to about 900,000 (SoundScan's low, 857,000 albums, came in 2005). source
  45. 2008-04First Record Store Day Conceived in September 2007 and first held in April 2008. source
  46. 2008-04-19First Record Store Day The first official Record Store Day, after a 2007 gathering of US shop owners. source
  47. 2010-11Black Friday RSD Record Store Day adds a Black Friday edition. source
  48. 2010-11-01SL-1200 discontinued Panasonic announces the end of Technics analog turntables. source
  49. 2011DMC allows DVS The DMC championships begin permitting vinyl-emulation systems. source
  50. 2014-12-0240 vinyl manufacturers counted worldwide The Vinyl Factory counts 40 manufacturers, with the US and Europe home to more than 80% (reported). source
  51. 2014-12-15Thai supplier reported at up to 90% of record PVC FACT reports Thai Plastic & Chemicals supplies up to 90% of record compound; the last US supplier closed in the mid-2000s. source
  52. 2015-12-05$790,000 White Album Ringo Starr's White Album No. 0000001 sells at Julien's, Los Angeles, the Guinness record for a vinyl record at auction. source
  53. 2016SL-1200 returns The SL-1200G and limited SL-1200GAE are announced at CES and ship in April and October. source
  54. 2016New presses arrive Viryl's WarmTone and Newbilt's Finebilt-based presses appear, among the first new presses in decades. source
  55. 2016-01-21Vinyl Brazil announced A planned São Paulo plant would join Polysom, then Latin America's only plant. source
  56. 2018Third Man Pressing runs Newbilt presses in Detroit The plant bought eight of the first ten Newbilt machines and expected about 5,000 records a shift. source
  57. 2018-12-03Steamless press reported Viryl's steamless module heats mold water electrically to 285 F, removing the gas boiler. source
  58. 2020US vinyl revenue passes CD $626 million against $483 million, the first time since 1986 (RIAA). source
  59. 2020RSD Drops Record Store Day is split into three Drops. source
  60. 2020-02-06Lacquer factory fire A fire destroys the Apollo Masters lacquer factory in Banning, California, leaving MDC in Japan as the sole lacquer maker. source
  61. 2020-02-06Apollo Masters lacquer plant burns Fire destroys the only US lacquer maker, estimated at 70-85% of world supply (reported). source
  62. 2021-11-05Lead times of three months to a year Mixmag reports long waits, Adele's 30 at over 500,000 vinyl copies, and capacity of about 160 million against demand of about 400 million a year. source
  63. 2022US vinyl passes CD in units 41 million vinyl units against 33 million CDs, the first time since 1987 (RIAA). source
  64. 2022-07-06Lead times hit 9-12 months GRAMMY.com reports industry-wide waits, against 4-6 weeks in 2018. source
  65. 2023-07Agnew Type 612 A new disk mastering lathe is unveiled at the International Disk Recording and Mastering Convention. source
  66. 2023-07-11BioVinyl launched optimal media and PlastChem launch a bio-attributed PVC record. source
  67. 2024-03-26EcoRecord launched Sonopress and Warner Music launch an injection-molded PET record; energy and sound claims are the maker's. source
  68. 2024-04-24Burlington Record Plant sold, set to move Equal Vision Records buys the plant, planning a July 2024 move to Albany, New York. source
  69. 2024-08India presses its first record in decades A plant in Navi Mumbai presses its first record, one of several new entrants reported in 2024. source
  70. 2025US vinyl tops $1 billion $1,042.9 million on 46.8 million units, the 19th straight year of growth (RIAA). source
  71. 2025Discogs collection record Discogs users add a record 114.2 million items to their collections (official, company figure). source
  72. 2025-01-23Backlog about three months Hypebot reports the typical plant backlog at about three months. source
  73. 2025-10-03The Life of a Showgirl released It sells 1.2 million vinyl copies on day one in the US, per Luminate. source
  74. 2026-03-16US vinyl passes $1 billion The RIAA's 2025 report shows vinyl revenue over $1 billion for the first time since 1983. source
  75. 2026-06$25,000 White Stripes 7-inch The White Stripes' "Lafayette Blues" sells for $25,000 on Discogs (reported). source
  76. 2026-07-17APC-2 lathe MusicTech reports the Teenage Engineering and SUPERSENSE APC-2, a 104 kg made-to-order lathe. source
  77. 2026-09-01RIAA mid-year 2026 US vinyl up 17.7% and CDs up 58.6% in the first half of 2026. source

Quick answers

When were records invented?
Thomas Edison developed the phonograph, which recorded on tinfoil-wrapped cylinders, in 1877; its patent issued February 19, 1878. Emile Berliner patented the flat-disc gramophone on November 8, 1887.
What is the difference between a phonograph and a gramophone?
Edison's phonograph (1877) recorded on cylinders, first tinfoil and later wax. Berliner's gramophone (1887) used flat discs with spiral grooves, which were far cheaper to mass-produce, and the disc won: Edison switched to discs in 1913.
Why are records 33 1/3 and 45 rpm?
Columbia launched the 33 1/3 rpm LP in June 1948, and RCA Victor answered with the 7-inch 45 rpm single in January 1949. After the war of the speeds, both companies issued both formats by 1950: the LP became the album and the 45 the single.
What were 78 rpm records made of?
Shellac resin mixed with fillers such as clay, slate or limestone, plus carbon black and cotton fibers. They were made commercially from 1897 to the late 1950s, and the era had no fixed standard for speed or equalization.
What is the RIAA curve?
It is the standard equalization curve, approved January 29, 1954, that cuts bass and boosts treble when a record is made; a phono preamp reverses it on playback. Before it, labels used different curves.
When did stereo records come out?
The RIAA adopted the Westrex 45/45 single-groove stereo system as the US standard on December 27, 1957. Audio Fidelity offered a stereo demo disc by mail that December.

Spot a mistake in this section? Tell us.

Sources for this side

  1. Library of Congress: History of the Cylinder Phonograph
  2. Smithsonian National Museum of American History: Hear My Voice," panel 4
  3. ASME: The Edison Phonograph Was the First Time Machine
  4. Library of Congress Information Bulletin (Audrey Fischer): Father of the Gramophone: Emile Berliner and the Birth of Recording
  5. Library of Congress: Berliner Recordings
  6. Library of Congress, American Memory (archived, End of Term Web Archive): The Gramophone
  7. Preservation Self-Assessment Program, University of Illinois: Phonograph Record
  8. Great 78 Project, Internet Archive: Preservation
  9. ARSCList (Malcolm Rockwell): message on Japanese 78 production
  10. History of Sound Recording Technology (recordinghistory.org): Rise, Fall and Death of the 78 RPM Record
  11. Library of Congress, Now See Hear!: Inside the Archival Box: The First Long-Playing Disc
  12. microgroove.jp (Matsubayashi Kohji): What was the Battle of the Speeds
  13. microgroove.jp (Matsubayashi Kohji): When was the RIAA curve established
  14. microgroove.jp (Matsubayashi Kohji): Why did the U.S. and Europe use different EQ curves
  15. Audio magazine (Ralph W. Wight): I See What You Mean! How the Westrex 45/45 System Was Adopted by the Record Makers
  16. Copper Magazine, PS Audio (Bill Leebens): Stereo at Sixty
  17. Wikipedia: Audio Fidelity Records
  18. richardhess.com (Richard L. Hess): US Music Media Statistics
  19. SPIN (Marc Hogan): Did Vinyl Really Die in the '90s? Well, Sort Of...
  20. The Register (John Leyden): Vinyl and streaming sales offset CD decline in UK music sales
  21. Associated Press via Spectrum News NY1 (David Sharp): Manufacturers struggle to keep pace with vinyl record demand
  22. NPR Morning Edition (Lydia Emmanouilidou): transcript on US pressing plants
  23. The Vinyl District: Record Store Day's Michael Kurtz and Carrie Colliton, The TVD Interview
  24. RIAA: Year-End 2025 Revenue Report" (PDF)
  25. What Hi-Fi? (Mary Stone): Vinyl revenue overtakes CDs for the first time since 1986
  26. Rolling Stone: For the First Time in Decades, People Bought More Vinyl Than CDs Last Year
  27. Music Week (Andre Paine): Vinyl outsells CD for first time in 35 years as total music sales reach £2 billion
  28. BPI: BPI Playback 2024: Women Dominate Charts, Physical Music Returns and Streaming Soars
  29. BPI: A new wave of global British breakthrough talent helps UK recorded music grow for an 11th consecutive year in 2025
  30. Music Week (Andre Paine): RIAA: US revenue hits record high as vinyl sales pass $1 billion
  31. Luminate: Taylor Swift Wasn't the Only Winner of Physical Sales in 2025
  32. RIAA: RIAA Reports $6 Billion in Mid-Year Recorded Music Revenue