Phonograph

A phonograph, subsequently referred to as a gramophone, and from the 1940s onward as a record player or, more recently, a turntable, functions as a mechanical and analog sound reproduction device.

A phonograph, later called a gramophone, and since the 1940s a record player, or more recently a turntable, is a device for the mechanical and analogue reproduction of sound.

Sound vibration waveforms are captured as physical deviations within a helical or spiral groove, which is engraved, etched, incised, or impressed onto the surface of a rotating cylinder or disc, collectively known as a record. For sound reproduction, this surface rotates while a playback stylus traverses the groove, vibrating in response to its contours and thereby faintly recreating the recorded audio. Early acoustic phonographs utilized this stylus vibration to activate a diaphragm, generating sound waves that were then projected into the open air via a flaring horn or transmitted directly to the listener's ears through stethoscope-like earphones.

Thomas Edison invented the phonograph in 1877. Subsequently, Alexander Graham Bell's Volta Laboratory introduced several enhancements in the 1880s, leading to the development of the graphophone, which featured wax-coated cardboard cylinders and a cutting stylus that traversed a helical groove laterally around the recording medium. During the 1890s, Emile Berliner pioneered the shift from phonograph cylinders to flat discs, characterized by a spiral groove extending from the periphery to the center, and introduced the term gramophone specifically for disc record players, a nomenclature widely adopted in numerous languages. Subsequent advancements encompassed refinements to the turntable, its drive mechanism, the stylus, the pickup system, and the overall sound and equalization systems.

Throughout the majority of the 20th century, the disc phonograph record served as the primary commercial format for audio distribution, establishing phonographs as the inaugural home audio technology widely adopted for personal use. The 1960s saw the emergence of 8-track cartridges and cassette tapes as alternative media. However, during the 1980s, the utilization of phonographs experienced a significant decline, largely attributable to the widespread adoption of cassettes and the advent of the compact disc. Nevertheless, disc records have witnessed a resurgence in popularity since the late 2000s.

Terminology

The nomenclature for record-playing devices exhibits considerable variation across the English-speaking world. Contemporary usage frequently designates the playback apparatus as a "turntable," "record player," or "record changer," each term signifying a distinct type of unit. A "record player" typically constitutes a self-contained system incorporating speakers, whereas a "turntable" denotes a component designed for connection to an external amplifier and separate loudspeakers. An "automatic turntable" automates the placement and retraction of the tonearm and motor shutdown post-playback, in contrast to a "manual turntable," which necessitates manual tonearm positioning and return. A "record changer" is engineered to sequentially play multiple records from a stack, while a coin-operated "jukebox" provides playback from an extensive selection of recordings.

Within a DJ setup incorporating a mixer, turntables are colloquially termed "decks." In subsequent iterations of electric phonographs, which have been widely recognized as record players or turntables since the 1940s, the stylus's mechanical movements are converted into an electrical signal by a transducer. This electrical signal is then processed through a phono stage, amplified, and finally rendered as audible sound via one or more loudspeakers.

The etymology of "phonograph," signifying "sound writing," traces back to the Greek terms φωνή (phonē), meaning 'sound' or 'voice,' and γραφή (graphē), meaning 'writing.' Analogously, "gramophone" and "graphophone" derive from the Greek words γράμμα (gramma), meaning 'letter,' and φωνή (phōnē), meaning 'voice.'

Within British English, the term "gramophone" can denote any sound-reproducing apparatus employing disc records. The Gramophone Company was instrumental in introducing and popularizing these devices in the United Kingdom. Initially, "gramophone" functioned as a proprietary trademark of the company, leading to stringent legal challenges against its use by rival disc record manufacturers. Nevertheless, an English court determined in 1910 that the term had transitioned into generic usage.

United States

In American English, the term "phonograph," though specifically referring to Edison's machines, was occasionally used generically from the 1890s onward to encompass cylinder-playing devices manufactured by other companies. However, it was considered strictly inaccurate to apply this term to Emile Berliner's Gramophone, a distinct apparatus designed for non-recordable discs, despite Edison's initial Phonograph patent having provisions for disc usage.

Australia

Within Australian English, "record player" was the common designation, while "turntable" served as a more technical descriptor. The term "gramophone" was exclusively applied to older, mechanical (wind-up) players, and "phonograph" was utilized in a manner consistent with British English. The phonograph made its inaugural Australian demonstration on June 14, 1878, during a meeting of the Royal Society of Victoria, presented by the Society's Honorary Secretary, Alex Sutherland. Sutherland subsequently published "The Sounds of the Consonants, as Indicated by the Phonograph" in the Society's journal in November of the same year. A public demonstration of the phonograph occurred on August 8, 1878, at the Society's annual conversazione, alongside various other novel inventions, such as the microphone.

Early History

Phonautograph

The phonautograph was conceived and patented on March 25, 1857, by Édouard-Léon Scott de Martinville, a French editor and typographer employed at a scientific publishing house in Paris. While editing Professor Longet's Traité de Physiologie, Scott encountered an engraved illustration depicting the anatomy of the human ear, which inspired him with "the imprudent idea of photographing the word." He commenced work on "le problème de la parole s'écrivant elle-même" ("the problem of speech writing itself") in either 1853 or 1854 (Scott provided both dates), with the objective of constructing a device capable of mimicking the human ear's function.

Scott's design involved coating a glass plate with a thin layer of lampblack. He then attached a delicate membrane, analogous to an eardrum, to the tapered end of an acoustic trumpet. Centered on this membrane was a rigid boar's bristle, approximately one centimeter in length, positioned to lightly graze the lampblack surface. When a person spoke into the trumpet, the membrane vibrated, causing the stylus to inscribe patterns onto the lampblack as the glass plate was horizontally slid through a precisely formed groove at a speed of one meter per second. On March 25, 1857, Scott secured French patent #17,897/31,470 for this apparatus, which he named the phonautograph. The earliest extant recording of a human voice was made on April 9, 1860, when Scott captured a rendition of "Au Clair de la Lune" ("By the Light of the Moon") using the device. Nevertheless, the phonautograph was not engineered for sound playback; Scott's intention was for individuals to visually interpret the tracings, which he termed phonautograms. While this marked a significant step, it was not the initial instance of a device directly tracing sound-producing vibrations, as the English physicist Thomas Young had employed tuning forks for this purpose in 1807. By late 1857, with backing from the Société d'encouragement pour l'industrie nationale, Scott's phonautograph achieved sufficient recording precision to gain acceptance within the scientific community, thereby contributing to the emerging field of acoustics.

The profound historical importance of the phonautograph in sound recording was not fully appreciated until March 2008. At that time, the device was rediscovered and restored from a Paris patent office by First Sounds, an informal consortium of American audio historians, recording engineers, and sound archivists dedicated to publicizing the earliest sound recordings. Subsequently, scientists at the Lawrence Berkeley National Laboratory in California digitally converted the phonautograms, successfully playing back the recorded sounds—an capability Scott himself had not envisioned. Before this breakthrough, Thomas Edison's 1877 phonograph recording was considered the oldest known human voice recording. The phonautograph ultimately influenced the development of the gramophone, as its inventor, Emile Berliner, utilized the phonautograph during the creation of his own apparatus.

Paleophone

Charles Cros, a French poet and inventor, is recognized as the first individual to conceptualize the recording of sound as a traced line and subsequently to theorize its reproduction from this tracing, ultimately devising a specific methodology for its accomplishment. On April 30, 1877, he formally submitted a sealed envelope containing a synopsis of his concepts to the French Academy of Sciences, a conventional practice among scientists and inventors to secure priority of unpublished ideas against future contention.

An exposition of Cros's invention was disseminated on October 10, 1877, by which time he had developed a more streamlined process: a recording stylus would engrave its trace through a thin layer of acid-resistant material on a metallic surface, which could then be etched in an acid bath. This procedure directly produced the requisite groove, circumventing the complexities of an intermediary photographic stage. While the article's author designated the apparatus a phonographe, Cros personally preferred the term paleophone, occasionally translated into French as voix du passé ('voice of the past').

Cros, a poet of limited financial resources, was unable to commission the construction of a functional prototype and initially intended to freely contribute his concepts to the public domain for others to implement. However, upon the transatlantic dissemination of initial reports concerning Edison's ostensibly independent invention, Cros arranged for his sealed letter of April 30 to be unsealed and publicly read at the December 3, 1877, session of the French Academy of Sciences, thereby asserting his scientific claim for priority of conception.

During the inaugural decade (1890–1900) of commercial manufacturing for rudimentary disc records, Cros's pioneering direct acid-etch method was employed to fabricate the metallic master discs. Nevertheless, Cros was deceased by this period, having passed away in 1888 at the age of 45, and thus was unable to claim recognition or observe the nascent stages of the extensive phonographic archive he had envisioned.

The Early Phonographs

Thomas Edison conceptualized the fundamental principles of sound recording and reproduction between May and July 1877. This development emerged as a collateral outcome of his endeavors to replay recorded telegraphic communications and to mechanize speech for telephonic transmission. His initial experimental work utilized waxed paper. Edison publicly announced his invention of the inaugural phonograph, an apparatus designed for both recording and replaying sound, on November 21, 1877. Prior reports of his work appeared in Scientific American and various newspapers in early November, with an even earlier mention of Edison developing a "talking-machine" published in the Chicago Daily Tribune on May 9. The device was first demonstrated on November 29 and subsequently patented on February 19, 1878, under US Patent 200,521. A notable account from December 1877 describes a visitor presenting a "small, simple machine" to the editors of Scientific American. Without preamble, the visitor operated a crank, and to the astonishment of those present, the machine articulated: 'Good morning. How do you do? How do you like the phonograph?' This demonstration effectively introduced the phonograph through its own vocal capabilities.

Music critic Herman Klein was present at an early demonstration (1881–82) of a comparable phonographic apparatus. Reflecting on the reproductive fidelity of the nascent phonograph, he observed: "It sounded to my ear like someone singing about half a mile away, or talking at the other end of a big hall; but the effect was rather pleasant, save for a peculiar nasal quality wholly due to the mechanism, although there was little of the scratching that later was a prominent feature of the flat disc." Klein further noted the relative simplicity of the recording process for this rudimentary device: "I had to keep my mouth about six inches away from the horn and remember not to make my voice too loud if I wanted anything approximating to a clear reproduction; that was all." Upon hearing his own voice replayed for the first time, Klein recounted that while some friends recognized it, others did not, concluding, "I daresay both opinions were correct."

In 1878, The Argus newspaper from Melbourne, Australia, documented a demonstration at the Royal Society of Victoria, noting a substantial attendance of individuals who displayed considerable interest in the scientific instruments on display. Among these, Mr. Sutherland's phonograph trial was particularly engaging and amusing. Multiple attempts were made, achieving varying degrees of success. While "Rule Britannia" was reproduced distinctly, the rendition of the convivial song "He's a jolly good fellow" elicited significant laughter, as it reportedly sounded like an 80-year-old man with a hoarse voice.

Early Phonograph Mechanisms

Edison's initial phonographs utilized a thin metal sheet, typically tinfoil, which was temporarily wrapped around a helically grooved cylinder. This cylinder was mounted on a correspondingly threaded rod, supported by both plain and threaded bearings. As the cylinder rotated and gradually advanced along its axis, airborne sound waves caused a diaphragm to vibrate. This diaphragm was connected to a stylus, which then indented the foil into the cylinder's groove, thereby recording the vibrations as "hill-and-dale" variations in indentation depth.

The Advent of Disc Records

By 1890, record manufacturers had implemented a rudimentary duplication process to facilitate mass production. During this method, live performers would record a master phonograph, from which up to ten tubes would lead to blank cylinders on other phonographs. Prior to this innovation, each record required individual custom production. Subsequently, a more advanced pantograph-based technique emerged, enabling the simultaneous creation of 90–150 copies per record. Nevertheless, as demand for specific recordings escalated, popular artists frequently had to re-record their songs multiple times. For instance, George Washington Johnson, recognized as the medium's first prominent African-American star, reportedly performed his "The Laughing Song" (or the distinct "The Whistling Coon") thousands of times in the studio throughout his career. He sometimes rendered "The Laughing Song" over fifty times in a single day, earning twenty cents per performance, while the average price of a cylinder in the mid-1890s was approximately fifty cents.

Preservation of Historical Recordings

Lambert's lead cylinder recording, created for an experimental talking clock, is frequently cited as the oldest surviving playable sound recording, although its early dating remains a subject of debate. Wax phonograph cylinder recordings of Handel's choral music, produced on June 29, 1888, at The Crystal Palace in London, were previously considered the oldest known musical recordings. However, this distinction was superseded by the recent playback by American historians of a phonautograph recording of Au clair de la lune, which dates to April 9, 1860.

The 1860 phonautogram had remained unplayed until recently, serving primarily as a graphic transcription of sound waves on paper for visual analysis. Contemporary optical scanning and image processing technologies have revitalized these early recordings, enabling the playback of exceptionally delicate or physically unplayable media without direct physical contact.

A tinfoil recording from an 1878 demonstration of Edison's phonograph in St. Louis, Missouri, has been successfully reproduced through optical scanning and digital analysis. Several other early tinfoil recordings are known to exist, including one believed to capture the voice of U.S. President Rutherford B. Hayes, which predates the St. Louis recording; however, as of May 2014, these have not yet been scanned. These antique tinfoil recordings, often stored folded, are too fragile for playback with a stylus without incurring significant damage. Edison's 1877 tinfoil recording of Mary Had a Little Lamb, which has not been preserved, is recognized as the first instance of recorded verse.

During the phonograph's 50th anniversary, Edison recounted reciting Mary Had a Little Lamb to test his initial machine. This 1927 event was captured by an early sound-on-film newsreel camera, and an audio segment from its soundtrack is occasionally misidentified as the original 1877 recording. Among the earliest verified recordings by notable figures that have survived to the present are wax cylinder recordings made by 19th-century media personalities such as P. T. Barnum and Shakespearean actor Edwin Booth.

Advancements at the Volta Laboratory

Alexander Graham Bell and his two collaborators significantly modified Edison's tinfoil phonograph, enabling it to reproduce sound from wax rather than tinfoil. Their research commenced at Bell's Volta Laboratory in Washington, D.C., in 1879 and culminated in 1886 with the issuance of fundamental patents for wax-based recording.

Despite Edison's 1877 invention of the phonograph, its acclaim was not attributable to its operational efficiency. Recording with his tinfoil phonograph proved impractical due to the fragility of the tinfoil, which tore easily. Furthermore, even with precise stylus adjustment, sound reproduction was distorted and limited to a few playbacks. Nevertheless, Edison had conceptualized sound recording. Immediately following this discovery, however, he reportedly deferred its improvement, purportedly due to a commitment to dedicate the subsequent five years to developing New York City's electric light and power infrastructure.

The Volta Challenge

Concurrently, Alexander Graham Bell, inherently a scientist and experimenter, sought new endeavors following his successful patenting of the telephone. Sumner Tainter indicates that Gardiner Green Hubbard influenced Bell to address the phonograph's limitations. Bell had married Hubbard's daughter, Mabel, in 1879, during which time Hubbard presided over the Edison Speaking Phonograph Co. This organization, having acquired the Edison patent, faced financial difficulties because consumers were disinclined to purchase a device that frequently malfunctioned and was challenging for the average user to operate.

The Volta Graphophone

Sound vibrations were impressed into wax applied to the Edison phonograph. A notable recording featured the text: "There are more things in heaven and earth, Horatio, than are dreamed of in your philosophy. I am a Graphophone and my mother was a phonograph." The majority of disc machines developed at the Volta Laboratory incorporated vertically mounted turntables. This design choice originated from early experimental setups where the turntable and disc were affixed to a shop lathe, alongside the recording and reproducing heads. Subsequent complete models largely retained the vertical turntable configuration.

An intriguing deviation from this design was a horizontal seven-inch turntable. This particular machine, manufactured in 1886, replicated an earlier model that Chichester Bell had transported to Europe. Tainter secured U.S. patent 385,886 on July 10, 1888. The playing arm exhibited rigidity, save for a 90-degree pivoted vertical movement facilitating record removal or repositioning to the starting point. During operation, the record both rotated and traversed laterally beneath the stylus, thereby inscribing a spiral with a density of 150 grooves per inch.

The fundamental difference between Edison's initial phonograph patent and the 1886 patent by Bell and Tainter resided in their respective recording methodologies. Edison's approach involved indenting sound waves onto tinfoil, whereas Bell and Tainter's innovation entailed cutting or "engraving" sound waves into a wax record using a sharp recording stylus.

Commercialization of the Graphophone

By 1885, confident in their array of practical inventions, the Volta Associates initiated patent applications and commenced investor outreach. The Volta Graphophone Company, based in Alexandria, Virginia, was established on January 6, 1886, and formally incorporated on February 3, 1886. Its purpose was to manage the patents and oversee the commercialization of their sound recording and reproduction technologies, notably including the precursor to the Dictaphone.

Following multiple demonstrations by the Volta Associates in Washington, D.C., Philadelphia businessmen founded the American Graphophone Company on March 28, 1887. This entity was established to manufacture and distribute the devices within the nascent phonograph market. Subsequently, the Volta Graphophone Company merged with American Graphophone, which eventually developed into Columbia Records.

In 1893, Tainter developed a coin-operated Graphophone, protected by U.S. patent 506,348. This innovation aimed to compete with the nickel-in-the-slot entertainment phonograph, U.S. patent 428,750, which Louis T. Glass, manager of the Pacific Phonograph Company, had demonstrated in 1889.

The innovations by Volta Associates established the groundwork for the effective integration of dictating machines into commercial operations, primarily due to the practicality of their wax recording method and the robustness of their devices. However, the recording industry's emergence as a significant contributor to home entertainment necessitated additional years of development, including renewed efforts by Edison and further enhancements by Emile Berliner and numerous other contributors.

This technology rapidly gained international traction, finding novel applications in various regions. For instance, in 1895, Hungary pioneered the use of phonographs for conducting folklore and ethnomusicological research, a methodology that subsequently became standard practice within ethnography.

Comparison of Disc and Cylinder Recording Media

Discs do not inherently surpass cylinders in terms of audio fidelity. Instead, the format's primary advantages resided in its manufacturing process: discs could be stamped, and their matrices could be distributed to various production facilities, facilitating global dissemination of recordings. Conversely, cylinders could not be stamped until Edison introduced the gold moulding process between 1901 and 1902.

Following extensive experimentation, Berliner initiated the commercial production of his disc records and "gramophones" in 1892. His "phonograph record" represented the inaugural disc record made available to the public. These initial discs measured five inches (13 cm) in diameter and featured single-sided recordings. By 1895, seven-inch (17.5 cm) records were introduced. Concurrently, Berliner substituted the hard rubber material used for discs with a shellac compound. Despite these advancements, Berliner's early recordings exhibited suboptimal sound quality. Subsequent efforts by Eldridge R. Johnson ultimately enhanced the sound fidelity to a level comparable to that of cylinder recordings.

Wax cylinders remained in use into the 1920s, notably employed by Alois Benjamin Saliger, a Czech immigrant, businessman, and inventor based in New York City. Saliger utilized cylinders for his "Psycho-Phone" or "Psychophone," a specialized phonograph or gramophone designed for applications in psychology. Invented in 1927 for sleep learning, the Psychophone incorporated a clock mounted atop the phonograph, alongside a repeater mechanism for continuous rewinding and playback of recordings. In contrast to Edison's spring-powered, crank-operated machines, Psychophone models were equipped with an electric motor. Saliger secured a patent for this device in 1932, designating it the "automatic time-controlled suggestion machine."

The Ascendancy of the Disc Record

During the 1930s, vinyl, initially termed vinylite, emerged as a recording material for radio transcription discs and commercial advertisements. Concurrently, very few records intended for domestic consumption were produced from this substance. Vinyl found widespread application in the production of 78-rpm V-discs, distributed to U.S. soldiers throughout World War II, which substantially mitigated breakage during transit. The inaugural commercial vinylite recording comprised a set of five 12-inch discs titled "Prince Igor" (Asch Records album S-800), re-recorded from Soviet masters in 1945. While Victor commenced sales of some vinyl 78s for home use in late 1945, the majority of 78-rpm records continued to be manufactured from a shellac compound until the format's complete obsolescence. (Shellac records were characterized by greater weight and fragility.) Conversely, 33s and 45s were exclusively fabricated from vinyl, with the exception of certain 45s produced from polystyrene.

The Inaugural All-Transistor Phonograph

In 1955, Philco engineered and manufactured the world's first all-transistor phonograph models, TPA-1 and TPA-2, which were publicly announced in the June 28, 1955, edition of The Wall Street Journal. Philco initiated sales of these all-transistor phonographs in the autumn of 1955, priced at $59.95. The October 1955 issue of Radio & Television News magazine featured a comprehensive, full-page article (page 41) detailing Philco's innovative consumer product. The TPA-1 and TPA-2 portable all-transistor phonograph models were designed exclusively for playing 45 rpm records and operated on a power supply of four 1.5-volt "D" batteries. The acronym "TPA" denotes "Transistor Phonograph Amplifier." Their internal circuitry incorporated three Philco germanium PNP alloy-fused junction audio frequency transistors. Following the conclusion of the 1956 season, Philco opted to discontinue both models due to the prohibitive cost of transistors relative to vacuum tubes; however, by 1961, a portable, battery-powered radio-phonograph featuring seven transistors became available for $49.95 (equivalent to $538.16 in 2024).

Turntable Design Classifications

Currently, three primary phonograph designs exist: belt-drive, direct-drive, and idler-wheel.

A belt-drive turntable features a motor positioned eccentrically from the platter, either beneath or external to it, with an elastomeric drive belt connecting it to the platter or counter-platter.

The direct-drive turntable was conceived by Shuichi Obata, an engineer affiliated with Matsushita (currently Panasonic). In 1969, Matsushita introduced the Technics SP-10, marking the debut of direct-drive turntables in the commercial market. The Technics SL-1200 emerged as the most influential direct-drive model, achieving widespread adoption in DJ culture for several decades, particularly after the rise of turntablism within hip hop.

Tonearm Systems

Within certain high-fidelity audio systems, the tonearm, which supports the pickup, is produced independently of the motor and turntable assembly. Specialized manufacturers, such as the English firm SME, focus exclusively on tonearm production.

Cueing Mechanism

Advanced turntable designs commonly integrate a "cue lever," a mechanism engineered to mechanically lower the tonearm onto the record surface. This feature facilitates precise track selection, enables temporary pausing of playback, and mitigates the potential for scratching the record, a risk often associated with manual tonearm placement.

Linear Tracking Systems

Initial advancements in linear tracking turntable technology emerged from Rek-O-Kut (portable lathe/phonograph) and Ortho-Sonic during the 1950s, followed by Acoustical in the early 1960s. However, these early iterations were superseded by more effective implementations of the concept that appeared from the late 1960s to the early 1980s.

Pickup Cartridge Systems

The pickup, also known as a cartridge, functions as a transducer, converting the mechanical vibrations generated by a stylus into an electrical signal. This electrical signal subsequently undergoes amplification and is transformed into audible sound via one or more loudspeakers. Historically, crystal and ceramic pickups, which utilize the piezoelectric effect, have been largely supplanted by magnetic cartridges.

The pickup assembly incorporates a stylus, typically featuring a small diamond or sapphire tip, which traverses the record groove. Prolonged contact with the groove inevitably leads to stylus wear, necessitating its periodic replacement.

Styli are categorized primarily as spherical or elliptical, despite their tips being shaped as a half-sphere or half-ellipsoid, respectively. Spherical styli typically exhibit greater durability but offer less precise groove tracking, resulting in a reduced high-frequency response. Conversely, elliptical styli generally provide superior groove tracking, leading to enhanced high-frequency response and reduced distortion. For DJ applications, the inherent robustness of spherical styli often makes them preferable for techniques such as back-cuing and scratching. Furthermore, several advanced elliptical variations exist, including the Shibata or fine line stylus, which are designed to more accurately reproduce high-frequency information embedded within the record groove, a capability particularly crucial for the playback of quadraphonic recordings.

Optical Playback Systems

Specialized laser turntables employ an optical laser pickup to read the record groove. This method eliminates physical contact with the record, theoretically preventing wear. However, the significance of this advantage is subject to debate, as vinyl records have demonstrated the capacity to endure up to 1200 plays without substantial audio degradation, contingent upon the use of a high-quality cartridge and meticulous surface cleanliness. A notable drawback of laser turntables is the imperative for an exceptionally clean record surface; otherwise, the laser may audibly reproduce surface dust and debris that a mechanical stylus would typically displace.

An alternative methodology involves capturing a high-resolution photograph or scan of each record side, subsequently interpreting the groove images through specialized computer software. While an amateur endeavor utilizing a flatbed scanner yielded insufficient fidelity, a professional system implemented by the Library of Congress achieves exceptional quality. This advanced system offers the capability to recover and reconstruct recordings from delicate shellac discs, even those fragmented into multiple pieces.

Stylus

The evolution of stylus design was significantly influenced by the requirements of the CD-4 quadraphonic sound modulation process, which necessitated a frequency response up to 50 kHz. Cartridges, such as the Technics EPC-100CMK4, demonstrated playback capabilities reaching 100 kHz. Achieving this performance required a stylus with a narrow side radius, typically 5 micrometres (0.2 mils). While a narrow-profile elliptical stylus could reproduce higher frequencies (exceeding 20 kHz), its limited contact surface led to accelerated wear. To mitigate this issue, Norio Shibata of JVC developed the Shibata stylus in Japan around 1972.

The Shibata-designed stylus provides an expanded contact area within the record groove, consequently reducing pressure on the vinyl surface and minimizing wear. An additional benefit of this increased contact surface is the stylus's ability to track sections of the vinyl that were unaffected by the wear patterns of conventional spherical styli. A demonstration by JVC illustrated this advantage: records subjected to 500 plays at a relatively high 4.5 g tracking force with a spherical stylus exhibited flawless playback when subsequently used with a Shibata profile.

Subsequent developments in stylus technology pursued the objective of further increasing contact surface, building upon the innovations of the Shibata design. Notable chronological advancements include the "Hughes" Shibata variant (1975), "Ogura" (1978), and Van den Hul (1982). These advanced stylus types are marketed under various proprietary names, such as "Hyperelliptical" (Shure), "Alliptic", "Fine Line" (Ortofon), "Line contact" (Audio Technica), "Polyhedron", "LAC", or "Stereohedron" (Stanton).

The keel-shaped diamond stylus emerged as a consequence of the CED Videodisc's invention. This innovation, combined with advancements in laser-diamond-cutting technologies, facilitated the development of "ridge"-shaped styli, exemplified by designs such as Namiki (1985) and Fritz Gyger (1989). This category of stylus is commercially designated as "MicroLine" (Audio-Technica), "Micro-Ridge" (Shure), or "Replicant" (Ortofon).

To mitigate the issue of record wear caused by steel needles, which frequently led to cracking, RCA Victor developed unbreakable records in 1930. This innovation involved blending polyvinyl chloride with plasticizers, forming a proprietary compound named Victrolac, which was initially implemented in motion picture discs in 1931.

Equalization

Since the late 1950s, the RIAA equalization standard has been predominantly adopted by nearly all phono input stages. Prior to its standardization, numerous divergent equalization schemes were employed, including those by EMI, His Master's Voice, Columbia, Decca FFRR, NAB, Ortho, and BBC transcription. Recordings produced with these alternative equalization curves typically exhibit an unnatural sound when played through a RIAA-equalized preamplifier, commonly known as a "phono stage." While high-performance "multicurve disc" phono stages, featuring multiple selectable equalization options, are no longer widely available, certain vintage units, such as the LEAK Varislope series, remain obtainable and can be restored. Additionally, contemporary phono stages like the Esoteric Sound Re-Equalizer or the K-A-B MK2 Vintage Signal Processor offer similar functionalities.

Contemporary Usage and Models

Despite being largely superseded by the introduction of the compact disc in 1982, record albums maintained modest sales throughout the 1980s and 1990s, though they were progressively marginalized by CD players and tape decks in domestic audio systems. The production and sale of record players continued into the 21st century, albeit in limited quantities and primarily for professional disc jockeys. However, following a resurgence in record sales since the late 2000s, there has been a notable increase in the manufacturing and availability of turntables. For instance, Panasonic reintroduced its acclaimed Technics SL-1200 at the 2016 Consumer Electronics Show, an event where Sony also prominently featured a new turntable, reflecting renewed interest in the format. Similarly, Audio-Technica revived its 1980s Sound Burger portable player in 2023.

Within the entry-level market segment, Crosley has achieved significant popularity with its portable suitcase record players, playing a prominent role in the vinyl revival and facilitating its adoption among younger demographics and children throughout the 2010s.

Renewed interest in vinyl records has stimulated the development of turntables equipped with advanced modern functionalities. USB turntables, for instance, incorporate a built-in audio interface that facilitates the direct transfer of analog sound to a connected computer. While some USB models transmit audio without inherent equalization, they are typically bundled with software that enables post-transfer adjustment of the audio file's equalization. Furthermore, numerous turntables are commercially available that are specifically engineered for USB connection to a computer, primarily for the purpose of "needle dropping."

Certain contemporary turntables feature Bluetooth output, enabling wireless audio playback through compatible speaker systems. Notably, Sony has introduced a high-end turntable equipped with an analog-to-digital converter, capable of transforming the audio from a playing record into a 24-bit high-resolution digital file, available in DSD or WAV formats.

Phonograph record

• Phonograph record
• Phonograph cylinder
• The Archéophone is utilized for converting various forms of cylinder recordings into contemporary, discrete digital recording formats.
• Audio signal processing
• Compressed air gramophone
• List of phonograph manufacturers
• Talking Machine World
• Vinyl killer
• Turntablism

References

Bruil, Rudolf A. (January 8, 2004). "Linear Tonearms."

• Bruil, Rudolf A. (January 8, 2004). "Linear Tonearms Archived 2011-10-17 at the Wayback Machine." Retrieved on July 25, 2011.
• Gelatt, Roland. The Fabulous Phonograph, 1877–1977. Second revised edition, also the First Collier Books edition, in the series Sounds of the Century. New York: Collier, 1977. 349 pages, illustrated. ISBN 0-02-032680-7.
• Heumann, Michael. "Metal Machine Music: The Phonograph's Voice and the Transformation of Writing." eContact! 14.3 — Turntablism (January 2013). Montréal: CEC.
• Koenigsberg, Allen. The Patent History of the Phonograph, 1877–1912. APM Press, 1991.
• Reddie, Lovell N. (1908). "The Gramophone And The Mechanical Recording And Reproduction Of Musical Sounds." Annual Report of the Board of Regents of the Smithsonian Institution: 209–231.eContact! 14.3 — Turntablism (January 2013). Montréal: CEC.
• Weissenbrunner, Karin. "Experimental Turntablism: Historical overview of experiments with record players / records — or Scratches from Second-Hand Technology." eContact! 14.3 — Turntablism (January 2013). Montréal: CEC.
• Carson, B. H.; Burt, A. D.; Reiskind, H. I. "A Record Changer And Record Of Complementary Design." RCA Review, June 1949.

• c.1915 Swiss hot-air engined gramophone at Museum of Retro Technology
• Early recordings from around the world
• The Cylinder Archive
• Cylinder Preservation & Digitization Project – Over 6,000 cylinder recordings held by the Department of Special Collections, University of California, Santa Barbara, free for download or streamed online.
• History of Recorded Sound: Phonographs and Records
• Listen to early recordings on the Edison Phonograph
• Say What? – Essay on phonograph technology and intellectual property law
• The Analogue Dept – Information, images and tutorials; strongly focused on Thorens brand
• 45 rpm player and changer at work on YouTube
• Turntable History on Enjoy the Music.com
• 2-point and Arc Protractor generators on AlignmentProtractor.com