[image] The phonograph, or gramophone, was the most common device for playing recorded Sound from the 1870s through the 1980s.
Usage of these terms is somewhat different in American English and British English; see usage note below. In more modern usage, this device is often called a turntable or record player. In the late 19th and early 20th century, the alternative term talking machine was sometimes used. The phonograph was the first device for recording and replaying sound.
The term phonograph meaning "writing sound", is derived from Greek roots. Similar related terms gramophone and graphophone have similar root meanings. The coinage, particularly the use of the "-graph" root, may have been influenced by the then-existing words "phonographic" and "phonography," which referred to a system of phonetic shorthand; in 1852 the New York Times carried an advertisement for "Professor Webster's phonographic class," and in 1859 the New York State Teachers' Association tabled a motion to "employ a phonographic recorder" to record its meetings. Arguably, any device used to record sound or reproduce recorded sound could be called a type of "phonograph", but in common practice it has come to mean historic technologies of sound recording.
Thomas Alva Edison announced his invention of the first phonograph, a device for recording and replaying sound, on November 21, 1877 and he demonstrated the device for the first time on November 29 (he patented it on February 19, 1878; US Pat. No. 200,521). Edison's early phonographs recorded onto a Phonograph cylinder using an up-down (vertical) motion of the stylus. Edison's early patents show that he also considered the idea that sound could be recorded as a Spiral onto a disc, but Edison concentrated his efforts on cylinders, since the groove on the outside of a rotating cylinder provides a constant velocity to the stylus in the groove, which Edison considered more "scientifically correct". Edison's patent specified that the audio recording was embossed, and it was not until 1889 that engraved recordings were patented by Bell and Tainter.
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In American English, "phonograph" was the most common generic term for any early sound reproducing machine. Emile Berliner's Gramophone was considered a type of phonograph. "Gramophone" was a brand name, and as such in the same category as "Victrola," "Zon-o-phone," "Graphophone" and "Graphonola" referring to specific brands of sound reproducing machines.
The brand "Gramophone" was not used in the USA after 1901, and the word fell out of use there. In contemporary American usage "phonograph" most usually refers to disc record machines or turntables, the most common type of analogue recording from the 1910s on. The word has survived in America based on its nickname form, "Grammy", in the Grammy Awards.
Strictly speaking, the gramophone is the machine reproducing sound from an engraved archive, whereas a phonograph is a machine that captures sound onto an engraved archive, i.e. a Lathe.
Recordings made on a cylinder remain at a constant linear velocity for the entirety of the recording, while those made on a disc have a higher linear velocity at the outer portion of the groove compared to the inner portion.
Edison's patented recording method recorded with vertical modulations in a groove. Berliner utilized a lateraly modulated groove. Though Edison's recording technology was better than Berliner's, there were commercial advantages to a disc system:
Berliner successfully argued that his technology was different enough from Edison's that he did not need to pay royalties on it, which reduced his business expenses.
Through experimentation, in 1892 Berliner began commercial production of his disc records, and "gramophones" or "talking-machines". His "Gramophone record" was the first disc record to be offered to the public. They were five inches (12.7 cm) in diameter and recorded on one side only. Seven-inch (actual size: 17.5 cm) records followed in 1895. By 1901, ten-inch (actual size: 25.0 cm) records being sold by the Victor Talking Machine Company, and Berliner had sold his interests. By 1908, double sided disc recorded records became demanded by the public, and cylinders fell into disfavor. Edison felt the commercial pressure for disc records, and by 1912, though reluctant at first, his movement to disc records was in full swing.
From the mid-1890s until the early 1920s both Phonograph cylinder and disc recordings and machines to play them on were widely mass marketed and sold. The disc system gradually became more popular due to its cheaper price and better marketing by disc record companies. Edison ceased cylinder manufacture in the fall of 1929, and the history of disc and cylinder rivalry was concluded.
Christmas 1925 brought improved Radio technology and radio sales, bringing many phonograph dealers to financial ruin. With efforts at improved audio fidelity, the big record companies succeeded in keeping business booming through the end of the decade, but the record sales plummeted during the Great Depression, with many companies merging or going out of business. Booms in record sales returned after World War II. [image] The turntable remained a common element of home Audio systems well after the introduction of other media such as audio tape and even the early years of the Compact disc. They were not uncommon in home audio systems into the early 1990s.
In all high-fidelity systems, the crystal pickup has been replaced by the Magnetic cartridge using either a moving magnet or moving coil. In the moving magnet system, the stylus carries a tiny permanent Magnet, which is positioned between a series of fixed coils. As the magnet vibrates in response to the stylus following the record groove, it induces a tiny current in the coils. This current, now a weak alternating current representing the original sound wave from the recording session, is fed to an amplifier which boosts the signal, and then to a Loudspeaker where it is converted to sound waves. Because the magnet is so light, and is not coupled mechanically to the coils, the stylus follows the groove far more gently and faithfully. Moving coil systems, are generally more expensive and are preferred by some audiophiles. Here a tiny coil is attached to the stylus, and moves within the field of a permanent magnet. Magnetic cartridges provide a much lower output than a crystal pickup, in the range of a few millivolts, thus requiring a preamplifier stage. Moving-coil cartridges generate an even smaller signal, of a few hundred microvolts, and require additionally a transformer or pre-preamplifier stage. Electrical noise induced by power lines or other EMI are attenuated by various methods, including Electromagnetic shielding in the signal cables connecting the pickup to the amplifier.
The stylus is typically a conical Diamond tip on an aluminum tubular Cantilever for a Monophonic sound or rugged use, and an elliptical diamond tip for a stereo or binaural signal. Some very expensive styli have Ruby, Boron, or Carbon fiber cantilevers chosen for their exceptional stiffness. DJs use the more rugged conical (sometimes inaccurately called spherical) styli due to the frequent reversals of direction involved in Scratching.
Phonograph recordings are made with high frequencies boosted. Then during playback the high frequencies are rescaled to the initial level, which reduces groove background noise including clicks or pops. This is accomplished in the amplifier with a 'PHONO' input that uses a standardized RIAA equalization curve.
Two types of tracking error incident to a standard arm can affect the sound. As the tone arm tracks the groove, the stylus drags Tangent to the disc surface and resistance along the arm combines to create a horizontal skating force towards the center of the disc. Modern arms provide a spring-loaded or hanging weight bias which offsets this force, so as to leave the net horizontal force near zero. The second error occurs as the arm sweeps in an arc across a disc recording, causing the angle between the cartridge head and groove direction to change slightly. A change in angle, albeit small, may have an audible effect by creating a differential force on the groove walls. Making the arm longer so as to reduce this angle is one solution. Some arms have been manufactured with an auxillary arm which pivots the cartridge head on the main arm to maintain a constant angle.
[image] If the arm is not pivoted at a fixed point, but travels horizontally along a radius of the disc, there will be no skating force and no cartridge angle error. The arm is driven along a linear track using a Servomechanism to position it properly. Matsushita's Technics division developed one such practical system with its model SL-10 turntable in 1979, ten years after the introduction of the first Direct-drive turntable. Early Edison phonographs had utilized similar but spring powered drives to carry the stylus across the record at a pre-determined rate. In practice the linear tracking system is not widely used today due to its complexity and attendant expense. However some of the most sophisticated systems do employ this technique.
Phonograph turntables at a radio station, 2003
Updates to the 1970s era Technics SL-1200, have remained an industry standard for DJs to the present day. Turntables and vinyl records remain popular in mixing (mostly dance-oriented) forms of Electronic music, where they allow great latitude for physical manipulation of the music by the DJ.
In Hip hop music, the turntable is used as a Musical instrument. Manipulation of a record as part of the music rather than for normal playback or mixing, is called Turntablism. The basis of turntablism and its most well known technique is Scratching, pioneered by Grand Wizard Theodore. It was not until Herbie Hancock's Rockit in 1983 that the turntablism movement was recognized in popular music outside of a hip hop context. See List of turntablists for more influential turntablist artists.
The Laser turntable, which uses a laser as the pickup instead of a stylus in physical contact with the disk, was conceived of in the late 1980s, although early prototypes were not of usable audio quality. Practical laser turntables are now being manufactured by ELPJ. They are favoured by record libraries and some audiophiles since they eliminate wear completely. The turntable remains the preferred sound source in some high end audio systems.
Experimentation is in progress in retrieving the audio from old records by scanning the disc and analysing the scanned image, rather than using any sort of turntable, by Ofer Springer at the Hebrew University of Jerusalem.