141-636: The Victor Talking Machine Company was an American recording company and phonograph manufacturer, incorporated in 1901. Victor was an independent enterprise until 1929 when it was purchased by the Radio Corporation of America (RCA) and became the RCA Victor Division of the Radio Corporation of America until late 1968, when it was renamed RCA Records . Established in Camden, New Jersey , Victor
282-435: A caveat for a version using a brass rod instead of the needle. Other minor variations and improvements were made to the liquid microphone by Majoranna, Chambers, Vanni, Sykes, and Elisha Gray, and one version was patented by Reginald Fessenden in 1903. These were the first working microphones, but they were not practical for commercial application. The famous first phone conversation between Bell and Watson took place using
423-713: A mic ( / m aɪ k / ), or mike , is a transducer that converts sound into an electrical signal . Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound recording , two-way radios , megaphones , and radio and television broadcasting. They are also used in computers and other electronic devices, such as mobile phones , for recording sounds, speech recognition , VoIP , and other purposes, such as ultrasonic sensors or knock sensors . Several types of microphone are used today, which employ different methods to convert
564-403: A resonant circuit that modulates the frequency of the oscillator signal. Demodulation yields a low-noise audio frequency signal with a very low source impedance. The absence of a high bias voltage permits the use of a diaphragm with looser tension, which may be used to achieve wider frequency response due to higher compliance. The RF biasing process results in a lower electrical impedance capsule,
705-410: A turntable , is a device for the mechanical and analogue reproduction of sound . The sound vibration waveforms are recorded as corresponding physical deviations of a helical or spiral groove engraved, etched, incised, or impressed into the surface of a rotating cylinder or disc, called a record . To recreate the sound, the surface is similarly rotated while a playback stylus traces the groove and
846-419: A "cue lever", a device that mechanically lowers the tonearm on to the record. It enables the user to locate an individual track more easily, to pause a record, and to avoid the risk of scratching the record, which may require practice to avoid when lowering the tonearm manually. Early developments in linear turntables were from Rek-O-Kut (portable lathe/phonograph) and Ortho-Sonic in the 1950s, and Acoustical in
987-592: A 3.5 mm plug as usually used for stereo connections; the ring, instead of carrying the signal for a second channel, carries power. A valve microphone is a condenser microphone that uses a vacuum tube (valve) amplifier . They remain popular with enthusiasts of tube sound . The dynamic microphone (also known as the moving-coil microphone ) works via electromagnetic induction . They are robust, relatively inexpensive and resistant to moisture. This, coupled with their potentially high gain before feedback , makes them popular for on-stage use. Dynamic microphones use
1128-469: A Graphophone and my mother was a phonograph." Most of the disc machines designed at the Volta Lab had their disc mounted on vertical turntables. The explanation is that in the early experiments, the turntable, with disc, was mounted on the shop lathe, along with the recording and reproducing heads. Later, when the complete models were built, most of them featured vertical turntables. One interesting exception
1269-452: A button microphone), uses a capsule or button containing carbon granules pressed between two metal plates like the Berliner and Edison microphones. A voltage is applied across the metal plates, causing a small current to flow through the carbon. One of the plates, the diaphragm, vibrates in sympathy with incident sound waves, applying a varying pressure to the carbon. The changing pressure deforms
1410-477: A definite method for accomplishing the reproduction. On April 30, 1877, he deposited a sealed envelope containing a summary of his ideas with the French Academy of Sciences , a standard procedure used by scientists and inventors to establish priority of conception of unpublished ideas in the event of any later dispute. An account of his invention was published on October 10, 1877, by which date Cros had devised
1551-400: A device that could replicate the function of the human ear. Scott coated a plate of glass with a thin layer of lampblack . He then took an acoustic trumpet, and at its tapered end affixed a thin membrane that served as the analog to the eardrum . At the center of that membrane, he attached a rigid boar's bristle approximately a centimetre long, placed so that it just grazed the lampblack. As
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#17328454344101692-441: A diaphragm that is at least partially open on both sides. The pressure difference between the two sides produces its directional characteristics. Other elements such as the external shape of the microphone and external devices such as interference tubes can also alter a microphone's directional response. A pure pressure-gradient microphone is equally sensitive to sounds arriving from front or back but insensitive to sounds arriving from
1833-529: A different machine that played nonrecordable discs (although Edison's original Phonograph patent included the use of discs. ) In Australian English , "record player" was the term; "turntable" was a more technical term; "gramophone" was restricted to the old mechanical (i.e., wind-up) players; and "phonograph" was used as in British English . The "phonograph" was first demonstrated in Australia on 14 June 1878 to
1974-495: A high quality cartridge and that the surfaces are clean. An alternative approach is to take a high-resolution photograph or scan of each side of the record and interpret the image of the grooves using computer software . An amateur attempt using a flatbed scanner lacked satisfactory fidelity. A professional system employed by the Library of Congress produces excellent quality. Microphone A microphone , colloquially called
2115-435: A high-quality audio signal and are now the popular choice in laboratory and recording studio applications. The inherent suitability of this technology is due to the very small mass that must be moved by the incident sound wave compared to other microphone types that require the sound wave to do more work. Condenser microphones require a power source, provided either via microphone inputs on equipment as phantom power or from
2256-415: A home entertainment medium in the early 1920s presented Victor and the entire record industry with new challenges. Not only was music becoming available over the air free of charge, but a live radio broadcast made using high-quality microphones and heard over amplified receivers provided sound that was startlingly more clear and realistic than a contemporary phonograph record. Victor was initially dismissive of
2397-652: A human voice was conducted on April 9, 1860, when Scott recorded someone singing the song " Au Clair de la Lune " ("By the Light of the Moon") on the device. However, the device was not designed to play back sounds, as Scott intended for people to read back the tracings, which he called phonautograms. This was not the first time someone had used a device to create direct tracings of the vibrations of sound-producing objects, as tuning forks had been used in this way by English physicist Thomas Young in 1807. By late 1857, with support from
2538-492: A laser source travels through an optical fiber to illuminate the surface of a reflective diaphragm. Sound vibrations of the diaphragm modulate the intensity of light reflecting off the diaphragm in a specific direction. The modulated light is then transmitted over a second optical fiber to a photodetector, which transforms the intensity-modulated light into analog or digital audio for transmission or recording. Fiber-optic microphones possess high dynamic and frequency range, similar to
2679-539: A laser-photocell pair with a moving stream of smoke or vapor in the laser beam's path. Sound pressure waves cause disturbances in the smoke that in turn cause variations in the amount of laser light reaching the photodetector. A prototype of the device was demonstrated at the 127th Audio Engineering Society convention in New York City from 9 through October 12, 2009. Early microphones did not produce intelligible speech, until Alexander Graham Bell made improvements including
2820-453: A liquid microphone. The MEMS (microelectromechanical systems) microphone is also called a microphone chip or silicon microphone. A pressure-sensitive diaphragm is etched directly into a silicon wafer by MEMS processing techniques and is usually accompanied with an integrated preamplifier. Most MEMS microphones are variants of the condenser microphone design. Digital MEMS microphones have built-in analog-to-digital converter (ADC) circuits on
2961-680: A meeting of the Royal Society of Victoria by the Society's Honorary Secretary, Alex Sutherland who published "The Sounds of the Consonants, as Indicated by the Phonograph" in the Society's journal in November that year. On 8 August 1878 the phonograph was publicly demonstrated at the Society's annual conversazione , along with a range of other new inventions, including the microphone . The phonautograph
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#17328454344103102-518: A more direct procedure: the recording stylus could scribe its tracing through a thin coating of acid-resistant material on a metal surface and the surface could then be etched in an acid bath, producing the desired groove without the complication of an intermediate photographic procedure. The author of this article called the device a phonographe , but Cros himself favored the word paleophone , sometimes rendered in French as voix du passé ('voice of
3243-517: A new line of phonographs referred to as " Orthophonic Victrolas ", scientifically developed by Western Electric to play these new records. Victor's first electrical recordings, issued in the spring of 1925 were not advertised as such; in order to create an extensive catalog of records made by the new process to satisfy anticipated demand, and to allow dealers time to liquidate their stocks of old-style Victrolas, Victor and its longtime rival, Columbia Records , agreed to keep electrical recording secret until
3384-594: A polished wooden surface. The horn on the Edison-Bell machine was black and after a failed attempt at selling the painting to a cylinder record supplier of Edison Phonographs in the UK, a friend of Barraud's suggested that the painting could be brightened up (and possibly made more marketable) by substituting one of the brass-belled horns on display in the window at the new gramophone shop on Maiden Lane . The Gramophone Company in London
3525-457: A preamplifier and, therefore, do require phantom power, and circuits of modern passive ribbon microphones (i.e. those without the aforementioned preamplifier) are specifically designed to resist damage to the ribbon and transformer by phantom power. Also there are new ribbon materials available that are immune to wind blasts and phantom power. The carbon microphone was the earliest type of microphone. The carbon button microphone (or sometimes just
3666-399: A role in the development of the gramophone , whose inventor, Emile Berliner, worked with the phonautograph in the course of developing his own device. Charles Cros , a French poet and amateur scientist, is the first person known to have made the conceptual leap from recording sound as a traced line to the theoretical possibility of reproducing the sound from the tracing and then to devising
3807-463: A scientific and business 'victory.' A second account is that Johnson emerged as the 'Victor' from the lengthy and costly patent litigations involving Berliner and Frank Seaman's Zonophone . A third story is that Johnson's partner, Leon Douglass , derived the word from his wife's name 'Victoria.' Finally, a fourth story is that Johnson took the name from the popular 'Victor' bicycle, which he had admired for its superior engineering. Of these four accounts,
3948-437: A similar machine. On the early phonograph's reproductive capabilities he wrote in retrospect: "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. Recording for that primitive machine
4089-402: A slightly earlier one that is believed to preserve the voice of U.S. President Rutherford B. Hayes , but as of May 2014 they have not yet been scanned. These antique tinfoil recordings, which have typically been stored folded, are too fragile to be played back with a stylus without seriously damaging them. Edison's 1877 tinfoil recording of Mary Had a Little Lamb , not preserved, has been called
4230-414: A small battery. Power is necessary for establishing the capacitor plate voltage and is also needed to power the microphone electronics. Condenser microphones are also available with two diaphragms that can be electrically connected to provide a range of polar patterns , such as cardioid, omnidirectional, and figure-eight. It is also possible to vary the pattern continuously with some microphones, for example,
4371-422: A small, simple machine about which few preliminary remarks were offered. The visitor without any ceremony whatever turned the crank, and to the astonishment of all present the machine said: 'Good morning. How do you do? How do you like the phonograph?' The machine thus spoke for itself, and made known the fact that it was the phonograph..." The music critic Herman Klein attended an early demonstration (1881–82) of
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4512-598: A static charge is embedded in an electret by the alignment of the static charges in the material, much the way a permanent magnet is made by aligning the magnetic domains in a piece of iron. Due to their good performance and ease of manufacture, hence low cost, the vast majority of microphones made today are electret microphones; a semiconductor manufacturer estimates annual production at over one billion units. They are used in many applications, from high-quality recording and lavalier (lapel mic) use to built-in microphones in small sound recording devices and telephones. Prior to
4653-480: A stylus with a small diamond or sapphire tip that runs in the record groove. The stylus eventually becomes worn by contact with the groove, and it is usually replaceable. Styli are classified as spherical or elliptical, although the tip is actually shaped as a half-sphere or a half- ellipsoid . Spherical styli are generally more robust than other types, but do not follow the groove as accurately, giving diminished high frequency response. Elliptical styli usually track
4794-432: A thin, usually corrugated metal ribbon suspended in a magnetic field. The ribbon is electrically connected to the microphone's output, and its vibration within the magnetic field generates the electrical signal. Ribbon microphones are similar to moving coil microphones in the sense that both produce sound by means of magnetic induction. Basic ribbon microphones detect sound in a bi-directional (also called figure-eight, as in
4935-575: A useful by-product of which is that RF condenser microphones can be operated in damp weather conditions that could create problems in DC-biased microphones with contaminated insulating surfaces. The Sennheiser MKH series of microphones use the RF biasing technique. A covert, remotely energized application of the same physical principle called the Thing was devised by Soviet Russian inventor Leon Theremin and used to bug
5076-424: A variable-resistance microphone/transmitter. Bell's liquid transmitter consisted of a metal cup filled with water with a small amount of sulfuric acid added. A sound wave caused the diaphragm to move, forcing a needle to move up and down in the water. The electrical resistance between the wire and the cup was then inversely proportional to the size of the water meniscus around the submerged needle. Elisha Gray filed
5217-476: A very limited frequency response range but are very robust devices. The Boudet microphone, which used relatively large carbon balls, was similar to the granule carbon button microphones. Unlike other microphone types, the carbon microphone can also be used as a type of amplifier, using a small amount of sound energy to control a larger amount of electrical energy. Carbon microphones found use as early telephone repeaters , making long-distance phone calls possible in
5358-635: A very poor sound quality. The first microphone that enabled proper voice telephony was the (loose-contact) carbon microphone . This was independently developed by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although Edison was awarded the first patent in mid-1877 (after a long legal dispute), Hughes had demonstrated his working device in front of many witnesses some years earlier, and most historians credit him with its invention. The Berliner microphone found commercial success through
5499-413: A voltage when subjected to pressure—to convert vibrations into an electrical signal. An example of this is potassium sodium tartrate , which is a piezoelectric crystal that works as a transducer, both as a microphone and as a slimline loudspeaker component. Crystal microphones were once commonly supplied with vacuum tube (valve) equipment, such as domestic tape recorders. Their high output impedance matched
5640-550: Is a continuation of the Encyclopedic Discography of Victor Recordings (EDVR) project by Ted Fagan and William Moran to make a complete discography of all Victor recordings as well as adding the recordings of Columbia, Brunswick and other historic American labels now controlled by Sony Music Entertainment . The Victor archive files are the main source of information for this project. In 2011, the Library of Congress and Victor catalog owner Sony Music Entertainment launched
5781-421: Is a function of frequency. The body of the microphone is not infinitely small and, as a consequence, it tends to get in its own way with respect to sounds arriving from the rear, causing a slight flattening of the polar response. This flattening increases as the diameter of the microphone (assuming it's cylindrical) reaches the wavelength of the frequency in question. Therefore, the smallest diameter microphone gives
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5922-403: Is aimed at the surface of a window or other plane surface that is affected by sound. The vibrations of this surface change the angle at which the beam is reflected, and the motion of the laser spot from the returning beam is detected and converted to an audio signal. In a more robust and expensive implementation, the returned light is split and fed to an interferometer , which detects movement of
6063-548: Is at least one practical application that exploits those weaknesses: the use of a medium-size woofer placed closely in front of a "kick drum" ( bass drum ) in a drum set to act as a microphone. A commercial product example is the Yamaha Subkick, a 6.5-inch (170 mm) woofer shock-mounted into a 10" drum shell used in front of kick drums. Since a relatively massive membrane is unable to transduce high frequencies while being capable of tolerating strong low-frequency transients,
6204-409: Is especially important for playback of quadraphonic recordings. A few specialist laser turntables read the groove optically using a laser pickup. Since there is no physical contact with the record, no wear is incurred. However, this "no wear" advantage is debatable, since vinyl records have been tested to withstand even 1200 plays with no significant audio degradation, provided that it is played with
6345-535: Is often identified as the oldest surviving playable sound recording, although the evidence advanced for its early date is controversial. Wax phonograph cylinder recordings of Handel 's choral music made on June 29, 1888, at The Crystal Palace in London were thought to be the oldest-known surviving musical recordings, until the recent playback by a group of American historians of a phonautograph recording of Au clair de la lune recorded on April 9, 1860. The 1860 phonautogram had not until then been played, as it
6486-399: Is practically constant and the voltage across the capacitor changes instantaneously to reflect the change in capacitance. The voltage across the capacitor varies above and below the bias voltage. The voltage difference between the bias and the capacitor is seen across the series resistor. The voltage across the resistor is amplified for performance or recording. In most cases, the electronics in
6627-433: Is predominantly used in many languages. Later improvements through the years included modifications to the turntable and its drive system, stylus, pickup system, and the sound and equalization systems. The disc phonograph record was the dominant commercial audio distribution format throughout most of the 20th century, and phonographs became the first example of home audio that people owned and used at their residences. In
6768-457: Is therefore vibrated by it, faintly reproducing the recorded sound. In early acoustic phonographs, the stylus vibrated a diaphragm that produced sound waves coupled to the open air through a flaring horn , or directly to the listener's ears through stethoscope -type earphones. The phonograph was invented in 1877 by Thomas Edison ; its use would rise the following year. Alexander Graham Bell 's Volta Laboratory made several improvements in
6909-441: Is to sounds arriving at different angles about its central axis. The polar patterns illustrated above represent the locus of points in polar coordinates that produce the same signal level output in the microphone if a given sound pressure level (SPL) is generated from that point. How the physical body of the microphone is oriented relative to the diagrams depends on the microphone design. For large-membrane microphones such as in
7050-426: The Royal Society of Victoria , writing "There was a large attendance of ladies and gentlemen, who appeared greatly interested in the various scientific instruments exhibited. Among these the most interesting, perhaps, was the trial made by Mr. Sutherland with the phonograph, which was most amusing. Several trials were made, and were all more or less successful. 'Rule Britannia' was distinctly repeated, but great laughter
7191-471: The Røde NT2000 or CAD M179. There are two main categories of condenser microphones, depending on the method of extracting the audio signal from the transducer: DC-biased microphones, and radio frequency (RF) or high frequency (HF) condenser microphones. With a DC-biased condenser microphone , the plates are biased with a fixed charge ( Q ). The voltage maintained across the capacitor plates changes with
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#17328454344107332-405: The diagram below) pattern because the ribbon is open on both sides. Also, because the ribbon has much less mass it responds to the air velocity rather than the sound pressure . Though the symmetrical front and rear pickup can be a nuisance in normal stereo recording, the high side rejection can be used to advantage by positioning a ribbon microphone horizontally, for example above cymbals, so that
7473-410: The 1880s and introduced the graphophone , including the use of wax-coated cardboard cylinders and a cutting stylus that moved from side to side in a zigzag groove around the record. In the 1890s, Emile Berliner initiated the transition from phonograph cylinders to flat discs with a spiral groove running from the periphery to near the centre, coining the term gramophone for disc record players, which
7614-457: The 1940s as record players or turntables, the movements of the stylus are transformed into an electrical signal by a transducer . This signal is then converted back into sound through an amplifier and one or more loudspeakers . The term "phonograph", meaning "sound writing", originates from the Greek words φωνή (phonē, meaning 'sound' or 'voice') and γραφή (graphē, meaning 'writing'). Similarly,
7755-422: The 1956 season had ended, Philco decided to discontinue both models, for transistors were too expensive compared to vacuum tubes, but by 1961 a $ 49.95 ($ 509.29 in 2023) portable, battery-powered radio-phonograph with seven transistors was available. There are presently three main phonograph designs: belt-drive , direct-drive , and idler-wheel . In a belt-drive turntable the motor is located off-center from
7896-697: The 1960s, the use of 8-track cartridges and cassette tapes were introduced as alternatives. By 1987, phonograph use had declined sharply due to the popularity of cassettes and the rise of the compact disc . However, records have undergone a revival since the late 2000s . This resurgence has much to do with vinyl records' sparing use of audio processing, resulting in a more natural sound on high-quality replay equipment, compared to many digital releases that are highly processed for portable players in high-noise environmental conditions. However, unlike "plug-and-play" digital audio, vinyl record players have user-serviceable parts, which require attention to tonearm alignment and
8037-406: The 2010s, there has been increased interest and research into making piezoelectric MEMS microphones which are a significant architectural and material change from existing condenser style MEMS designs. In a plasma microphone, a plasma arc of ionized gas is used. The sound waves cause variations in the pressure around the plasma in turn causing variations in temperature which alter the conductance of
8178-516: The 78-rpm format was completely phased out. (Shellac records were heavier and more brittle.) 33s and 45s were, however, made exclusively of vinyl, with the exception of some 45s manufactured out of polystyrene . In 1955, Philco developed and produced the world's first all- transistor phonograph models TPA-1 and TPA-2, which were announced in the June 28, 1955 edition of The Wall Street Journal . Philco started to sell these all-transistor phonographs in
8319-458: The English physicist Robert Hooke was the first to experiment with a medium other than air with the invention of the " lovers' telephone " made of stretched wire with a cup attached at each end. In 1856, Italian inventor Antonio Meucci developed a dynamic microphone based on the generation of electric current by moving a coil of wire to various depths in a magnetic field. This method of modulation
8460-509: The French Academy of Sciences, claiming due scientific credit for priority of conception. Throughout the first decade (1890–1900) of commercial production of the earliest crude disc records, the direct acid-etch method first invented by Cros was used to create the metal master discs, but Cros was not around to claim any credit or to witness the humble beginnings of the eventually rich phonographic library he had foreseen. He had died in 1888 at
8601-581: The Graphophone, U.S. patent 506,348 , was developed by Tainter in 1893 to compete with nickel-in-the-slot entertainment phonograph U.S. patent 428,750 demonstrated in 1889 by Louis T. Glass, manager of the Pacific Phonograph Company. The work of the Volta Associates laid the foundation for the successful use of dictating machines in business, because their wax recording process
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#17328454344108742-634: The Mask and Wig Club, released in April, 1925. On March 21, 1925, Victor recorded its first electrical Red Seal disc, twelve inch 6502 by pianist Alfred Cortot , of works by Chopin and Schubert. In 1926, Johnson sold his controlling (but not holding) interest in the Victor Company to the banking firms of JW Seligman and Speyer & Co. , who in turn sold Victor to the Radio Corporation of America in 1929. The Discography of American Historical Recordings (DAHR)
8883-461: The National Jukebox offering streaming audio of more than 10,000 pre-1925 recorded works for listening by the general public; the majority of these recordings have not been widely available for over 100 years. Phonograph A phonograph , later called a gramophone (as a trademark since 1887, as a generic name in the UK since 1910), and since the 1940s a record player , or more recently
9024-507: The Oktava (pictured above), the upward direction in the polar diagram is usually perpendicular to the microphone body, commonly known as "side fire" or "side address". For small diaphragm microphones such as the Shure (also pictured above), it usually extends from the axis of the microphone commonly known as "end fire" or "top/end address". Some microphone designs combine several principles in creating
9165-575: The Société d'encouragement pour l'industrie nationale, Scott's phonautograph was recording sounds with sufficient precision to be adopted by the scientific community, paving the way for the nascent science of acoustics. The device's true significance in the history of recorded sound was not fully realized prior to March 2008, when it was discovered and resurrected in a Paris patent office by First Sounds, an informal collaborative of American audio historians, recording engineers, and sound archivists founded to make
9306-597: The US Ambassador's residence in Moscow between 1945 and 1952. An electret microphone is a type of condenser microphone invented by Gerhard Sessler and Jim West at Bell laboratories in 1962. The externally applied charge used for a conventional condenser microphone is replaced by a permanent charge in an electret material. An electret is a ferroelectric material that has been permanently electrically charged or polarized . The name comes from electrostatic and magnet ;
9447-674: The Victor, Monarch and De Luxe labels, with the Victor label on 7-inch records, Monarch on 10-inch records and De Luxe on 12-inch records. De Luxe Special 14-inch records were briefly marketed in 1903–1904. In 1905, all labels and sizes were consolidated into the Victor imprint. Victor recorded the first jazz and blues records ever issued. The Victor Military Band recorded the first recorded blues song, " The Memphis Blues ", on July 15, 1914, in Camden, New Jersey. In 1917, The Original Dixieland Jazz Band recorded " Livery Stable Blues ". The advent of radio as
9588-423: The Volta Associates were sure that they had a number of practical inventions, they filed patent applications and began to seek out investors. The Volta Graphophone Company of Alexandria, Virginia, was created on January 6, 1886, and incorporated on February 3, 1886. It was formed to control the patents and to handle the commercial development of their sound recording and reproduction inventions, one of which became
9729-557: The age of 45. Thomas Edison conceived the principle of recording and reproducing sound between May and July 1877 as a byproduct of his efforts to "play back" recorded telegraph messages and to automate speech sounds for transmission by telephone . His first experiments were with waxed paper. He announced his invention of the first phonograph , a device for recording and replaying sound, on November 21, 1877 (early reports appear in Scientific American and several newspapers in
9870-414: The air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone , which uses a coil of wire suspended in a magnetic field; the condenser microphone , which uses the vibrating diaphragm as a capacitor plate; and the contact microphone , which uses a crystal of piezoelectric material. Microphones typically need to be connected to a preamplifier before
10011-656: The autumn of 1925. Then, with the company's largest advertising campaign to date, Victor publicly announced the new technology and introduced its new records and the Orthophonic Victrola on November 2, 1925, dubbed "Victor Day". Victor's first commercial electrical recording was made at the company's Camden, New Jersey studios on February 26, 1925. A group of eight popular Victor artists, Billy Murray , Frank Banta, Henry Burr , Albert Campbell, Frank Croxton , John Meyer, Monroe Silver , and Rudy Wiedoeft gathered to record "A Miniature Concert". Several takes were recorded by
10152-523: The beginning of November, and an even earlier announcement of Edison working on a "talking-machine" can be found in the Chicago Daily Tribune on May 9 ), and he demonstrated the device for the first time on November 29 (it was patented on February 19, 1878, as US Patent 200,521). "In December, 1877, a young man came into the office of the Scientific American , and placed before the editors
10293-619: The best high fidelity conventional microphones. Fiber-optic microphones do not react to or influence any electrical, magnetic, electrostatic or radioactive fields (this is called EMI/RFI immunity). The fiber-optic microphone design is therefore ideal for use in areas where conventional microphones are ineffective or dangerous, such as inside industrial turbines or in magnetic resonance imaging (MRI) equipment environments. Fiber-optic microphones are robust, resistant to environmental changes in heat and moisture, and can be produced for any directionality or impedance matching . The distance between
10434-472: The best omnidirectional characteristics at high frequencies. The wavelength of sound at 10 kHz is 1.4" (3.5 cm). The smallest measuring microphones are often 1/4" (6 mm) in diameter, which practically eliminates directionality even up to the highest frequencies. Omnidirectional microphones, unlike cardioids, do not employ resonant cavities as delays, and so can be considered the "purest" microphones in terms of low coloration; they add very little to
10575-407: The capsule (around 5 to 100 pF ) and the value of the bias resistor (100 MΩ to tens of GΩ) form a filter that is high-pass for the audio signal, and low-pass for the bias voltage. Note that the time constant of an RC circuit equals the product of the resistance and capacitance. Within the time frame of the capacitance change (as much as 50 ms at 20 Hz audio signal), the charge
10716-535: The company maintained its eminence as America's foremost producer of records and phonographs until the 1960s. In 1896, Emile Berliner , the inventor of the gramophone and disc record, contracted machinist Eldridge R. Johnson to manufacture his inventions. There are different accounts as to how the "Victor" name came about. RCA historian Fred Barnum gives various possible origins of the name in "His Master's Voice" In America , he writes, "One story claims that Johnson considered his first improved Gramophone to be both
10857-426: The cylinder was rotated and slowly progressed along its axis , the airborne sound vibrated a diaphragm connected to a stylus that indented the foil into the cylinder's groove, thereby recording the vibrations as "hill-and-dale" variations of the depth of the indentation. By 1890, record manufacturers had begun using a rudimentary duplication process to mass-produce their product. While the live performers recorded
10998-425: The desired polar pattern. This ranges from shielding (meaning diffraction/dissipation/absorption) by the housing itself to electronically combining dual membranes. An omnidirectional (or nondirectional) microphone's response is generally considered to be a perfect sphere in three dimensions. In the real world, this is not the case. As with directional microphones, the polar pattern for an "omnidirectional" microphone
11139-490: The distance between the plates. Because the capacitance of the plates is inversely proportional to the distance between them, the vibrations produce changes in capacitance. These changes in capacitance are used to measure the audio signal . The assembly of fixed and movable plates is called an element or capsule . Condenser microphones span the range from telephone mouthpieces through inexpensive karaoke microphones to high-fidelity recording microphones. They generally produce
11280-560: The earliest sound recordings available to the public. The phonautograms were then digitally converted by scientists at the Lawrence Berkeley National Laboratory in California, who were able to play back the recorded sounds, something Scott had never conceived of. Prior to this point, the earliest known record of a human voice was thought to be an 1877 phonograph recording by Thomas Edison . The phonautograph would play
11421-502: The earliest verified recordings by the famous that have survived to the present. Alexander Graham Bell and his two associates took Edison's tinfoil phonograph and modified it considerably to make it reproduce sound from wax instead of tinfoil. They began their work at Bell's Volta Laboratory in Washington, D. C., in 1879, and continued until they were granted basic patents in 1886 for recording in wax. Although Edison had invented
11562-485: The early 1960s. These were eclipsed by more successful implementations of the concept from the late 1960s through the early 1980s. The pickup or cartridge is a transducer that converts mechanical vibrations from a stylus into an electrical signal. The electrical signal is amplified and converted into sound by one or more loudspeakers . Crystal and ceramic pickups that use the piezoelectric effect have largely been replaced by magnetic cartridges . The pickup includes
11703-486: The effective dynamic range of ribbon microphones at low frequencies. Protective wind screens can reduce the danger of damaging a vintage ribbon, and also reduce plosive artifacts in the recording. Properly designed wind screens produce negligible treble attenuation. In common with other classes of dynamic microphone, ribbon microphones do not require phantom power; in fact, this voltage can damage some older ribbon microphones. Some new modern ribbon microphone designs incorporate
11844-426: The encroachments of radio, but after plummeting sales and much apathy and resistance from the company's senior executives brought the company to the verge of bankruptcy, Victor switched from the acoustical or mechanical method of recording to the new microphone -based electrical system developed by Western Electric in 1925. Victor called its version of the improved fidelity recording process "Orthophonic", and marketed
11985-466: The era before vacuum tubes. Called a Brown's relay, these repeaters worked by mechanically coupling a magnetic telephone receiver to a carbon microphone: the faint signal from the receiver was transferred to the microphone, where it modulated a stronger electric current, producing a stronger electrical signal to send down the line. A crystal microphone or piezo microphone uses the phenomenon of piezoelectricity —the ability of some materials to produce
12126-494: The fall of 1955, for the price of $ 59.95. The October 1955 issue of Radio & Television News magazine (page 41), had a full page detailed article on Philco's new consumer product. The all-transistor portable phonograph TPA-1 and TPA-2 models played only 45rpm records and used four 1.5 volt "D" batteries for their power supply. The "TPA" stands for "Transistor Phonograph Amplifier". Their circuitry used three Philco germanium PNP alloy-fused junction audio frequency transistors. After
12267-555: The first Dictaphone . After the Volta Associates gave several demonstrations in the City of Washington, businessmen from Philadelphia created the American Graphophone Company on March 28, 1887, in order to produce and sell the machines for the budding phonograph marketplace. The Volta Graphophone Company then merged with American Graphophone, which itself later evolved into Columbia Records . A coin-operated version of
12408-545: The first instance of recorded verse . On the occasion of the 50th anniversary of the phonograph, Edison recounted reciting Mary Had a Little Lamb to test his first machine. The 1927 event was filmed by an early sound-on-film newsreel camera, and an audio clip from that film's soundtrack is sometimes mistakenly presented as the original 1877 recording. Wax cylinder recordings made by 19th-century media legends such as P. T. Barnum and Shakespearean actor Edwin Booth are amongst
12549-434: The first two are the most generally accepted." The first use of the Victor name was on a letterhead, dated March 28, 1901. Herbert Rose Barraud's deceased brother, a London photographer, willed him his estate, including his DC-powered Edison-Bell cylinder phonograph with a case of cylinders and his dog, named Nipper . Barraud's original painting depicts Nipper staring intently into the horn of an Edison-Bell while both sit on
12690-407: The glass plate was slid horizontally in a well formed groove at a speed of one meter per second, a person would speak into the trumpet, causing the membrane to vibrate and the stylus to trace figures that were scratched into the lampblack. On March 25, 1857, Scott received the French patent #17,897/31,470 for his device, which he called a phonautograph. The earliest known surviving recorded sound of
12831-413: The granules, causing the contact area between each pair of adjacent granules to change, and this causes the electrical resistance of the mass of granules to change. The changes in resistance cause a corresponding change in the current flowing through the microphone, producing the electrical signal. Carbon microphones were once commonly used in telephones; they have extremely low-quality sound reproduction and
12972-410: The groove more accurately, with increased high frequency response and less distortion. For DJ use, the relative robustness of spherical styli make them generally preferred for back-cuing and scratching. There are a number of derivations of the basic elliptical type, including the shibata or fine line stylus, which can more accurately reproduce high frequency information contained in the record groove. This
13113-476: The hard rubber used to make the discs with a shellac compound. Berliner's early records had poor sound quality, however. Work by Eldridge R. Johnson eventually improved the sound fidelity to a point where it was as good as the cylinder. In the 1930s, vinyl (originally known as vinylite) was introduced as a record material for radio transcription discs , and for radio commercials. At that time, virtually no discs for home use were made from this material. Vinyl
13254-770: The high input impedance (typically about 10 MΩ) of the vacuum tube input stage well. They were difficult to match to early transistor equipment and were quickly supplanted by dynamic microphones for a time, and later small electret condenser devices. The high impedance of the crystal microphone made it very susceptible to handling noise, both from the microphone itself and from the connecting cable. Piezoelectric transducers are often used as contact microphones to amplify sound from acoustic musical instruments, to sense drum hits, for triggering electronic samples, and to record sound in challenging environments, such as underwater under high pressure. Saddle-mounted pickups on acoustic guitars are generally piezoelectric devices that contact
13395-513: The internal baffle, allowing the selection of several response patterns ranging from "figure-eight" to "unidirectional". Such older ribbon microphones, some of which still provide high-quality sound reproduction, were once valued for this reason, but a good low-frequency response could be obtained only when the ribbon was suspended very loosely, which made them relatively fragile. Modern ribbon materials, including new nanomaterials , have now been introduced that eliminate those concerns and even improve
13536-400: The master phonograph, up to ten tubes led to blank cylinders in other phonographs. Until this development, each record had to be custom-made. Before long, a more advanced pantograph -based process made it possible to simultaneously produce 90–150 copies of each record. However, as demand for certain records grew, popular artists still needed to re-record and re-re-record their songs. Reportedly,
13677-566: The matrixes to stamp disc can be shipped to other printing plants for a global distribution of recordings; cylinders could not be stamped until 1901–1902, when the gold moulding process was introduced by Edison. Through experimentation, in 1892 Berliner began commercial production of his disc records and "gramophones". His " phonograph record " was the first disc record to be offered to the public. They were five inches (13 cm) in diameter and recorded on one side only. Seven-inch (17.5 cm) records followed in 1895. Also in 1895 Berliner replaced
13818-492: The medium's first major African-American star George Washington Johnson was obliged to perform his " The Laughing Song " (or the separate "The Whistling Coon") up to thousands of times in a studio during his recording career. Sometimes he would sing "The Laughing Song" more than fifty times in a day, at twenty cents per rendition. (The average price of a single cylinder in the mid-1890s was about fifty cents.) Lambert 's lead cylinder recording for an experimental talking clock
13959-423: The microphone itself contribute no voltage gain as the voltage differential is quite significant, up to several volts for high sound levels. RF condenser microphones use a comparatively low RF voltage, generated by a low-noise oscillator. The signal from the oscillator may either be amplitude modulated by the capacitance changes produced by the sound waves moving the capsule diaphragm, or the capsule may be part of
14100-489: The microphone's light source and its photodetector may be up to several kilometers without need for any preamplifier or another electrical device, making fiber-optic microphones suitable for industrial and surveillance acoustic monitoring. Fiber-optic microphones are used in very specific application areas such as for infrasound monitoring and noise cancellation . They have proven especially useful in medical applications, such as allowing radiologists, staff and patients within
14241-458: The name by competing disc record manufacturers was rigorously challenged in court. However, in 1910, an English court decision ruled that the term had become generic; In American English , "phonograph", properly specific to machines made by Edison, was sometimes used in a generic sense as early as the 1890s to include cylinder-playing machines made by others. But it was then considered strictly incorrect to apply it to Emile Berliner 's Gramophone,
14382-454: The next breakthrough with the first condenser microphone . In 1923, the first practical moving coil microphone was built. The Marconi-Sykes magnetophone, developed by Captain H. J. Round , became the standard for BBC studios in London. This was improved in 1930 by Alan Blumlein and Herbert Holman who released the HB1A and was the best standard of the day. Also in 1923, the ribbon microphone
14523-457: The next five years developing the New York City electric light and power system. Meanwhile, Bell, a scientist and experimenter at heart, was looking for new worlds to conquer after having patented the telephone . According to Sumner Tainter , it was through Gardiner Green Hubbard that Bell took up the phonograph challenge. Bell had married Hubbard's daughter Mabel in 1879 while Hubbard
14664-513: The old acoustical process, then additional takes were recorded electrically for test purposes. The electrical recordings turned out well, and Victor issued the results that summer as the two sides of twelve inch 78 rpm disc, Victor 35753. Victor's first electrical recording to be issued was Victor 19626, a ten-inch record consisting of two numbers recorded on March 16, 1925, from the University of Pennsylvania 's thirty-seventh annual production of
14805-517: The past'). Cros was a poet of meager means, not in a position to pay a machinist to build a working model, and largely content to bequeath his ideas to the public domain free of charge and let others reduce them to practice, but after the earliest reports of Edison's presumably independent invention crossed the Atlantic he had his sealed letter of April 30 opened and read at the December 3, 1877 meeting of
14946-496: The phonograph in 1877, the fame bestowed on him for this invention was not due to its efficiency. Recording with his tinfoil phonograph was too difficult to be practical, as the tinfoil tore easily, and even when the stylus was properly adjusted, its reproduction of sound was distorted, and good for only a few playbacks; nevertheless Edison had discovered the idea of sound recording . However immediately after his discovery he did not improve it, allegedly because of an agreement to spend
15087-495: The plasma. These variations in conductance can be picked up as variations superimposed on the electrical supply to the plasma. This is an experimental form of microphone. A loudspeaker, a transducer that turns an electrical signal into sound waves, is the functional opposite of a microphone. Since a conventional speaker is similar in construction to a dynamic microphone (with a diaphragm, coil and magnet), speakers can actually work "in reverse" as microphones. Reciprocity applies, so
15228-476: The platter, either underneath it or entirely outside of it, and is connected to the platter or counter-platter by a drive belt made from elastomeric material. The direct-drive turntable was invented by Shuichi Obata, an engineer at Matsushita (now Panasonic). In 1969, Matsushita released it as the Technics SP-10, the first direct-drive turntable on the market. The most influential direct-drive turntable
15369-468: The powerful and noisy magnetic field to converse normally, inside the MRI suites as well as in remote control rooms. Other uses include industrial equipment monitoring and audio calibration and measurement, high-fidelity recording and law enforcement. Laser microphones are often portrayed in movies as spy gadgets because they can be used to pick up sound at a distance from the microphone equipment. A laser beam
15510-415: The principal sound input to the principal axis (end- or side-address) of the microphone are used to describe the microphone. The condenser microphone , invented at Western Electric in 1916 by E. C. Wente, is also called a capacitor microphone or electrostatic microphone —capacitors were historically called condensers. The diaphragm acts as one plate of a capacitor, and audio vibrations produce changes in
15651-474: The proliferation of MEMS microphones, nearly all cell-phone, computer, PDA and headset microphones were electret types. Unlike other capacitor microphones, they require no polarizing voltage, but often contain an integrated preamplifier that does require power. This preamplifier is frequently phantom powered in sound reinforcement and studio applications. Monophonic microphones designed for personal computers (PCs), sometimes called multimedia microphones, use
15792-451: The rear lobe picks up sound only from the cymbals. Crossed figure 8, or Blumlein pair , stereo recording is gaining in popularity, and the figure-eight response of a ribbon microphone is ideal for that application. Other directional patterns are produced by enclosing one side of the ribbon in an acoustic trap or baffle, allowing sound to reach only one side. The classic RCA Type 77-DX microphone has several externally adjustable positions of
15933-461: The resulting microphone has the same impairments as a single-driver loudspeaker: limited low- and high-end frequency response, poorly controlled directivity , and low sensitivity . In practical use, speakers are sometimes used as microphones in applications where high bandwidth and sensitivity are not needed such as intercoms , walkie-talkies or video game voice chat peripherals, or when conventional microphones are in short supply. However, there
16074-498: The same CMOS chip making the chip a digital microphone and so more readily integrated with modern digital products. Major manufacturers producing MEMS silicon microphones are Wolfson Microelectronics (WM7xxx) now Cirrus Logic, InvenSense (product line sold by Analog Devices ), Akustica (AKU200x), Infineon (SMM310 product), Knowles Electronics, Memstech (MSMx), NXP Semiconductors (division bought by Knowles ), Sonion MEMS, Vesper, AAC Acoustic Technologies, and Omron. More recently, since
16215-436: The same dynamic principle as in a loudspeaker , only reversed. A small movable induction coil , positioned in the magnetic field of a permanent magnet, is attached to the diaphragm. When sound enters through the windscreen of the microphone, the sound wave moves the diaphragm which moves the coil in the magnetic field, producing a varying voltage across the coil through electromagnetic induction. Ribbon microphones use
16356-538: The side because sound arriving at the front and back at the same time creates no gradient between the two. The characteristic directional pattern of a pure pressure-gradient microphone is like a figure-8. Other polar patterns are derived by creating a capsule that combines these two effects in different ways. The cardioid, for instance, features a partially closed backside, so its response is a combination of pressure and pressure-gradient characteristics. A microphone's directionality or polar pattern indicates how sensitive it
16497-403: The signal can be recorded or reproduced . In order to speak to larger groups of people, a need arose to increase the volume of the human voice. The earliest devices used to achieve this were acoustic megaphones. Some of the first examples, from fifth-century-BC Greece, were theater masks with horn-shaped mouth openings that acoustically amplified the voice of actors in amphitheaters . In 1665,
16638-438: The speaker is often ideal for picking up the kick drum while reducing bleed from the nearby cymbals and snare drums. The inner elements of a microphone are the primary source of differences in directivity. A pressure microphone uses a diaphragm between a fixed internal volume of air and the environment and responds uniformly to pressure from all directions, so it is said to be omnidirectional. A pressure-gradient microphone uses
16779-479: The strings passing over the saddle. This type of microphone is different from magnetic coil pickups commonly visible on typical electric guitars , which use magnetic induction, rather than mechanical coupling, to pick up vibration. A fiber-optic microphone converts acoustic waves into electrical signals by sensing changes in light intensity, instead of sensing changes in capacitance or magnetic fields as with conventional microphones. During operation, light from
16920-535: The stylus, which thus described a spiral, recording 150 grooves to the inch. The basic distinction between the Edison's first phonograph patent and the Bell and Tainter patent of 1886 was the method of recording. Edison's method was to indent the sound waves on a piece of tin foil, while Bell and Tainter's invention called for cutting, or "engraving", the sound waves into a wax record with a sharp recording stylus. In 1885, when
17061-423: The surface by changes in the optical path length of the reflected beam. The former implementation is a tabletop experiment; the latter requires an extremely stable laser and precise optics. A new type of laser microphone is a device that uses a laser beam and smoke or vapor to detect sound vibrations in free air. On August 25, 2009, U.S. patent 7,580,533 issued for a Particulate Flow Detection Microphone based on
17202-519: The terms "gramophone" and "graphophone" have roots in the Greek words γράμμα (gramma, meaning 'letter') and φωνή (phōnē, meaning 'voice'). In British English , "gramophone" may refer to any sound-reproducing machine that utilizes disc records . These were introduced and popularized in the UK by the Gramophone Company . Initially, "gramophone" was a proprietary trademark of the company, and any use of
17343-550: The use by Alexander Graham Bell for his telephone and Berliner became employed by Bell. The carbon microphone was critical in the development of telephony, broadcasting and the recording industries. Thomas Edison refined the carbon microphone into his carbon-button transmitter of 1886. This microphone was employed at the first radio broadcast ever, a performance at the New York Metropolitan Opera House in 1910. In 1916, E.C. Wente of Western Electric developed
17484-403: The vibrations in the air, according to the capacitance equation (C = Q ⁄ V ), where Q = charge in coulombs , C = capacitance in farads and V = potential difference in volts . A nearly constant charge is maintained on the capacitor. As the capacitance changes, the charge across the capacitor does change very slightly, but at audible frequencies it is sensibly constant. The capacitance of
17625-577: The wear and choice of stylus, the most critical component affecting turntable sound. The terminology used to describe record-playing devices is not uniform across the English-speaking world. In modern contexts, the playback device is often referred to as a "turntable", "record player", or " record changer ". Each of these terms denotes distinct items. When integrated into a DJ setup with a mixer , turntables are colloquially known as "decks". In later versions of electric phonographs, commonly known since
17766-462: The word." In 1861, German inventor Johann Philipp Reis built an early sound transmitter (the " Reis telephone ") that used a metallic strip attached to a vibrating membrane that would produce intermittent current. Better results were achieved in 1876 with the " liquid transmitter " design in early telephones from Alexander Graham Bell and Elisha Gray – the diaphragm was attached to a conductive rod in an acid solution. These systems, however, gave
17907-548: Was a comparatively simple matter. 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. When it was played over to me and I heard my own voice for the first time, one or two friends who were present said that it sounded rather like mine; others declared that they would never have recognised it. I daresay both opinions were correct." The Argus newspaper from Melbourne, Australia, reported on an 1878 demonstration at
18048-641: Was a demand for high-fidelity microphones and greater directionality. Electro-Voice responded with their Academy Award -winning shotgun microphone in 1963. During the second half of the 20th century, development advanced quickly with the Shure Brothers bringing out the SM58 and SM57 . Microphones are categorized by their transducer principle (condenser, dynamic, etc.) and by their directional characteristics (omni, cardioid, etc.). Sometimes other characteristics such as diaphragm size, intended use or orientation of
18189-441: Was a horizontal seven inch turntable. The machine, although made in 1886, was a duplicate of one made earlier but taken to Europe by Chichester Bell . Tainter was granted U.S. patent 385,886 on July 10, 1888. The playing arm is rigid, except for a pivoted vertical motion of 90 degrees to allow removal of the record or a return to starting position. While recording or playing, the record not only rotated, but moved laterally under
18330-428: Was also the most enduring method for the technology of the telephone as well. Speaking of his device, Meucci wrote in 1857, "It consists of a vibrating diaphragm and an electrified magnet with a spiral wire that wraps around it. The vibrating diaphragm alters the current of the magnet. These alterations of current, transmitted to the other end of the wire, create analogous vibrations of the receiving diaphragm and reproduce
18471-413: Was caused by the repetition of the convivial song of 'He's a jolly good fellow,' which sounded as if it was being sung by an old man of 80 with a cracked voice." Edison's early phonographs recorded onto a thin sheet of metal, normally tinfoil , which was temporarily wrapped around a helically grooved cylinder mounted on a correspondingly threaded rod supported by plain and threaded bearings . While
18612-424: Was founded and managed by an American, William Barry Owen. Barraud paid a visit with a photograph of the painting and asked to borrow a horn. Owen gave Barraud an entire gramophone and asked him to paint it into the picture, offering to buy the result. On close inspection of the painting, the contours of the Edison-Bell phonograph are visible beneath the paint of the gramophone. In 1915, the "His Master's Voice" logo
18753-399: Was introduced, another electromagnetic type, believed to have been developed by Harry F. Olson , who applied the concept used in a ribbon speaker to making a microphone. Over the years these microphones were developed by several companies, most notably RCA that made large advancements in pattern control, to give the microphone directionality. With television and film technology booming there
18894-601: Was invented on March 25, 1857, by Frenchman Édouard-Léon Scott de Martinville , an editor and typographer of manuscripts at a scientific publishing house in Paris. One day while editing Professor Longet's Traité de Physiologie , he happened upon that customer's engraved illustration of the anatomy of the human ear, and conceived of "the imprudent idea of photographing the word." In 1853 or 1854 (Scott cited both years) he began working on "le problème de la parole s'écrivant elle-même" ("the problem of speech writing itself"), aiming to build
19035-589: Was only a transcription of sound waves into graphic form on paper for visual study. Recently developed optical scanning and image processing techniques have given new life to early recordings by making it possible to play unusually delicate or physically unplayable media without physical contact. A recording made on a sheet of tinfoil at an 1878 demonstration of Edison's phonograph in St. Louis, Missouri, has been played back by optical scanning and digital analysis. A few other early tinfoil recordings are known to survive, including
19176-443: Was practical and their machines were durable. But it would take several more years and the renewed efforts of Edison and the further improvements of Emile Berliner and many others, before the recording industry became a major factor in home entertainment . Discs are not inherently better than cylinders at providing audio fidelity. Rather, the advantages of the format are seen in the manufacturing process: discs can be stamped, and
19317-589: Was president of the Edison Speaking Phonograph Co., and his organization, which had purchased the Edison patent, was financially troubled because people did not want to buy a machine that seldom worked well and proved difficult for the average person to operate. The sound vibrations had been indented in the wax that had been applied to the Edison phonograph. The following was the text of one of their recordings: "There are more things in heaven and earth, Horatio, than are dreamed of in your philosophy. I am
19458-526: Was rendered in immense circular leaded-glass windows in the tower of the Victrola cabinet building at Victor's headquarters in Camden, New Jersey. The building still stands today with replica windows installed during RCA 's ownership of the plant in its later years. Today, one of the original windows is located at the Smithsonian museum in Washington, D.C. In the company's early years, Victor issued recordings on
19599-603: Was the Technics SL-1200 , which, following the spread of turntablism in hip hop culture, became the most widely-used turntable in DJ culture for several decades. In some high quality equipment the arm carrying the pickup, known as a tonearm, is manufactured separately from the motor and turntable unit. Companies specialising in the manufacture of tonearms include the English company SME . More sophisticated turntables were (and still are) frequently manufactured so as to incorporate
19740-400: Was the largest and most prestigious firm of its kind in the world, best known for its use of the iconic " His Master's Voice " trademark, the design, production and marketing of the popular "Victrola" line of phonographs and the company's extensive catalog of operatic and classical music recordings by world famous artists on the prestigious Red Seal label. After Victor merged with RCA in 1929,
19881-399: Was used for the popular 78-rpm V-discs issued to US soldiers during World War II . This significantly reduced breakage during transport. The first commercial vinylite record was the set of five 12" discs " Prince Igor " (Asch Records album S-800, dubbed from Soviet masters in 1945). Victor began selling some home-use vinyl 78s in late 1945; but most 78s were made of a shellac compound until
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