This article needs additional citations for verification .(January 2019) |
String instrument | |
---|---|
Other names | Dobro |
Hornbostel–Sachs classification | 321.322 |
Inventor(s) | John Dopyera |
Developed | 1920s |
Volume | Medium |
Attack | Fast |
Related instruments | |
Acoustic guitar | |
Builders | |
Dobro, National, National Reso-Phonic, Del Vecchio-Dinamico |
A resonator guitar or resophonic guitar (often erroneously called a " Dobro " [1] ) is an acoustic guitar that produces sound by conducting string vibrations through the bridge to one or more spun metal cones (resonators), instead of to the guitar's sounding board (top). Resonator guitars were originally designed to be louder than regular acoustic guitars, which were overwhelmed by horns and percussion instruments in dance orchestras. They became prized for their distinctive tone, and found life with bluegrass music and the blues well after electric amplification solved the problem of inadequate volume.
Resonator guitars are of two styles:
There are three main resonator designs:
Many variations of all these styles and designs have been produced under many brand names. The body of a resonator guitar may be made of wood, metal, or occasionally other materials. Typically there are two main sound holes, positioned on either side of the fingerboard extension. In the case of single-cone models, the sound holes are either both circular or both f-shaped, and symmetrical. The older tricone design has irregularly shaped sound holes. Cutaway body styles may truncate or omit the lower f-hole.
John Dopyera, responding to a request by the steel guitar player George Beauchamp, developed the resonator guitar to produce an instrument that could produce sufficient volume to compete with brass and reed instruments. Dopyera experimented with configurations of up to four resonator cones and with cones composed of several different metals.
In 1927, Dopyera and Beauchamp formed the National String Instrument Corporation to manufacture resonator guitars under the brand name "National". The first models were metal-bodied, and featured three conical aluminum resonators joined by a T-shaped aluminum bar that supported the bridge—a system called the tricone. National originally produced wooden-bodied Tricone models at their factory in Los Angeles, California. They called these models the Triolian, but made only 12 of them. They changed the body meant for tricones to single-cone models, but kept the name.
In 1928, Dopyera left National to form the Dobro Manufacturing Company with his brothers Rudy, Emile, Robert, and Louis, "Dobro" being a contraction of Dopyera Brothers' and also meaning "good" in their native Slovak language. Dobro released a competing resonator guitar with a single resonator with its concave surface uppermost, often described as bowl-shaped, under a distinctive circular perforated metal cover plate with the bridge at its center resting on an eight-legged aluminum spider. This system was cheaper to produce, and produced more volume than National's tricone.
Over time, the word "dobro" has become a genericized trademark used to refer to any resonator guitar. [3] [4] [1]
National countered the Dobro with its own single resonator model, which Dopyera had designed before he left the company. They also continued to produce the tricone design, which many players preferred for its tone. Both National single and tricone resonators remained conical, with their convex surfaces uppermost. Single resonator models used a wooden biscuit at the cone apex to support the bridge. At this point, both companies sourced many components from Adolph Rickenbacker, including the aluminum resonators.
After much legal action, the Dopyera brothers gained control of both National and Dobro in 1932, and subsequently merged them into the "National Dobro Corporation". However, they ceased all resonator guitars production following the U.S. entry into World War II in 1941.
Emile Dopyera (also known as Ed Dopera) manufactured Dobros from 1959, before selling the company and trademark to Semie Moseley, who merged it with his Mosrite guitar company and manufactured Dobros for a time.
In 1967, Rudy and Emile Dopyera formed the Original Musical Instrument Company (OMI) to manufacture resonator guitars, first branded Hound Dog. In 1970 they again acquired the Dobro trademark, Mosrite having gone into temporary liquidation.
The Gibson Guitar Corporation acquired OMI in 1993, and announced it would defend its right to exclusive use of the Dobro trademark—which many people commonly used for any resonator guitar. As of 2006 [update] , Gibson produces several round sound hole models under the Dobro name, and cheaper f-hole models both under the Hound Dog name and also its Epiphone brand. All have a single resonator, and many are available in either round or square neck.
After the formation of the National Dobro Corporation, the term National was often used to refer to an instrument with a non-inverted cone, to distinguish these designs from the inverted-cone Dobro. Makers particularly used it for single-cone biscuit designs, as the relatively elaborate and expensive tricone was for some time out of production. Players and collectors also used the term for the older tricone instruments, which despite their softer volume and rarity were still preferred by some players.
In 1942, the National Dobro Corporation, which no longer produced Dobros or other resonator instruments, reorganized under the name Valco. Valco produced a large volume and variety of fretted instruments under many names, with National as its premium brand. By the early 1960s, Valco again produced resonator guitars for mail order under the brand name National. These instruments had biscuit resonators and bodies of wood and fiberglass.
In the late 1980s, the National brand and trademark reappeared with the formation of National Reso-Phonic Guitars. The company produces six-string resonator guitars of all three traditional resonator types, focusing on reproducing the feel and sound of old instruments. Its other resonator instruments include a 12-string guitar, ukuleles and mandolins.
Casa Del Vecchio Ltda. of São Paulo, Brazil, has produced a wide range of guitars and other string instruments since Angelo Del Vecchio founded the company in 1902. In the 1930s, they began producing resonator guitars, [5] resulting in their most famous model: the Dinâmico, (their trade term for resophonic instruments). In addition to the Dinâmico guitar, which is still in production, Del Vecchio also produced Dinâmico cavaquinhos, approximately like a resonator ukulele, and resonator mandolins. They also produce standard acoustic instruments, as well as Hawaiian-style lap steel guitars.
In the late 1990s Amistar, a Czech Republic manufacturer, began marketing tricone resonator guitars. [6]
Wayne Acoustic Guitars produced a spider bridge resonator guitar in the 1940s and 1950s in Australia. They were made out of cheap Australian timber using a tone ring rather than a tone well but they had no neck reinforcement and a pressed (rather than spun) cone, often called a pillow cone due to the shapes pressed into the face to strengthen the cone. Many examples exist today. [7] As of 2010, Don Morrison was producing resonators under the Donmo brand name.
Asian brands such as Regal, Johnson, Recording King, Republic Guitars, and Rogue also produce or import a wide variety of comparatively inexpensive resonator guitars. Johnson has also produced resonator ukuleles and mandolins.
A company called Gallotone in South Africa produced resonator guitars in the 1950s and 1960s..[ citation needed ]
Resonator guitars are popularly used in bluegrass music and in blues. Traditionally, bluegrass players used square necked Dobro-style instruments played as a steel guitar while blues players favored round-necked National-style guitars, often played with a bottleneck.
The resonator guitar is most often played as a lap steel guitar, and the more common square-necked version is limited to this playing position. Square neck instruments are always set up with the high action favored by steel guitar players, and tuned to a suitable open tuning.
The round necked version is equally capable in either lap steel or Spanish guitar position. It may be set up with a variety of action heights, ranging from the half-inch favored for steel guitar (making use of the frets almost impossible) to the small fraction of an inch used by conventional guitarists. A compromise is most common, allowing use of a bottleneck on the top strings but also use of the frets as desired, with the guitar played in the conventional position.
Many different tunings are used. Some square neck tunings are not recommended for round neck resonator guitars, owing to the high string tension required, which in turn requires the stronger square neck. Slack-key guitar tunings are most suitable for bottleneck playing, and conventional E-A-D-G-B-E guitar tuning is also popular.
The resonator guitar was introduced to bluegrass music by Josh Graves, who played with Flatt and Scruggs, in the mid-1950s. Graves used the hard-driving, syncopated three-finger picking style developed by Earl Scruggs for the five-string banjo. Modern players continue to play the instrument this way, with one notable exception being the late Tut Taylor who played with a flat pick.
Tuning for the resonator guitar within the bluegrass genre is most often an open G with the strings pitched to D G D G B D or G B D G B D, from the lowest to highest. Occasionally variant tunings are used, such as an open D: D A D F# A D.
Other notable bluegrass players include Jerry Douglas, Mike Auldridge, Rob Ickes, Phil Leadbetter and Andy Hall.
The resonator guitar was used in older country music, notably by Bashful Brother Oswald of Roy Acuff's band, but was largely supplanted by the pedal steel guitar during the 1950s. Despite this, the instrument is still frequently used as an alternative to the steel guitar. James Burton and Grady Martin played flat picked dobro on many recordings. Leon McAuliffe initially played a dobro before exclusively transitioning to electric lap and console steel guitars.
The resonator guitar is also significant to the world of blues music, particularly the Southern style of country blues that grew out of the Mississippi Delta and Louisiana. Unlike country and bluegrass players, most blues players play the resonator guitar in the standard guitar position, with the fretboard facing away from the player. Many use slides or bottlenecks.
Many players in the 1920s and 1930s, including Bo Carter, and others like Bukka White, Son House, Tampa Red and Blind Boy Fuller, used the instruments because they were louder than standard acoustic guitars, which enabled them to play for a larger crowd in areas that did not yet have electricity for amplifiers. For the same reason street musicians like Arvella Gray used resonator guitars while busking, e.g. on Chicago's Maxwell Street.
One of the few Delta Blues players to play lap style in the 1930s was Black Ace, also known as B.K. Turner. He toured and recorded with his mentor Oscar "Buddy" Woods, who also played lap style Resonator guitar and Lap Steel. Woods, who was fifteen years older than Ace, taught him his guitar playing techniques.
The instrument is still used by some blues players, notably Taj Mahal, Eric Sardinas, Alvin Hart, The Deacon Brandon Reeves, Warren Haynes, Derek Trucks, Doyle Bramhall II, Roland Chadwick, John Hammond Jr., Roy Rogers, John Mooney, and Megan Lovell of Larkin Poe. Mark Knopfler has also played the guitar, and his National resonator is pictured on the cover of the Dire Straits album Brothers in Arms.
Single resonator guitars with a bowl resonator and spider (Dobro style) are often heard in bluegrass music, while tricone (National style) instruments are still preferred by many blues players. Single-resonator biscuit (also sometimes called National style) instruments are also produced, and give a different sound again.
Many bluegrass players prefer wooden bodies, blues players either metal or wood. The early metal-bodied instruments were generally of better quality than the earliest wooden-bodied ones, but this may not be the case with more recent instruments. Metal bodies may be brass, aluminum or steel. Fiberglass has also been used as a body material, and a marble bodied resonator guitar is commercially available. Both metal and wooden bodies are often painted, or wooden bodies may be stained or lacquered, metal bodies may be plated or plain.
Bluegrass players tend to use square necks, while blues players tend to prefer round necks. Square-necked guitars give a slightly greater variety of possible tunings, while round-necked guitars give a much greater variety of playing positions.
Single resonator instruments can have round sound holes with screens, or round sound holes without screens, which many players used to remove to improve the bass response. They can also have f-holes, often with gauze screens that are also sometimes removed but have an important function in strengthening the belly particularly if the body is of wood.
An enormous number of combinations are possible, most can be found either on old or new instruments or both, and many styles of music can be played on any resonator guitar.
Though the original aim of the resonator was increased volume, some modern instruments incorporate electric pickups and related technology. Many modern makers produce instruments with one of a variety of pickup types—and some players retrofit pickups to non-electric instruments. Most commonly, resonator guitars use piezoelectric pickups (contact type transducers) placed under the bridge or elsewhere on the instrument, or use specialized microphones placed inside the instrument or directly in front of the cone to preserve the resonator's distinctive tone.
However, all acoustic and semi-acoustic styles are very sensitive to audio feedback, making the design and placement of these pickups extremely critical and specialized. Some modern models are manufactured with both piezoelectric and magnetic pickups. In addition, some piezoelectric styles are active pickups, in that they incorporate a preamplifier that increases the output of the pickup to match modern amplifier inputs. More recently, solid body electric resonator guitars have appeared. These instruments incorporate one or more magnetic pickups, and are played via amplification.
As well as resonator guitars, resonators have been used on:
Historic brands of resonator guitar still in use today include National, Dobro, and Regal. None of these brands are still owned by their original companies. Each returned after one or more long breaks in production:
The steel-string acoustic guitar is a modern form of guitar that descends from the gut-strung Romantic guitar, but is strung with steel strings for a brighter, louder sound. Like the modern classical guitar, it is often referred to simply as an acoustic guitar, or sometimes as a folk guitar.
An electric guitar is a guitar that requires external electric sound amplification in order to be heard at typical performance volumes, unlike a standard acoustic guitar. It uses one or more pickups to convert the vibration of its strings into electrical signals, which ultimately are reproduced as sound by loudspeakers. The sound is sometimes shaped or electronically altered to achieve different timbres or tonal qualities via amplifier settings or knobs on the guitar. Often, this is done through the use of effects such as reverb, distortion and "overdrive"; the latter is considered to be a key element of electric blues guitar music and jazz, rock and heavy metal guitar playing. Designs also exist combining attributes of electric and acoustic guitars: the semi-acoustic and acoustic-electric guitars.
The guitar is a stringed musical instrument that is usually fretted and typically has six or twelve strings. It is usually held flat against the player's body and played by strumming or plucking the strings with the dominant hand, while simultaneously pressing selected strings against frets with the fingers of the opposite hand. A guitar pick may also be used to strike the strings. The sound of the guitar is projected either acoustically, by means of a resonant hollow chamber on the guitar, or amplified by an electronic pickup and an amplifier.
Rickenbacker International Corporation is a string instrument manufacturer based in Santa Ana, California. Rickenbacker is the first known maker of electric guitars, with a steel guitar in 1932, and produces a range of electric guitars and basses.
Slide guitar is a technique for playing the guitar that is often used in blues music. It involves playing a guitar while holding a hard object against the strings, creating the opportunity for glissando effects and deep vibratos that reflect characteristics of the human singing voice. It typically involves playing the guitar in the traditional position with the use of a slide fitted on one of the guitarist's fingers. The slide may be a metal or glass tube, such as the neck of a bottle, giving rise to the term bottleneck guitar to describe this type of playing. The strings are typically plucked while the slide is moved over the strings to change the pitch. The guitar may also be placed on the player's lap and played with a hand-held bar.
A steel guitar is any guitar played while moving a steel bar or similar hard object against plucked strings. The bar itself is called a "steel" and is the source of the name "steel guitar". The instrument differs from a conventional guitar in that it is played without using frets; conceptually, it is somewhat akin to playing a guitar with one finger. Known for its portamento capabilities, gliding smoothly over every pitch between notes, the instrument can produce a sinuous crying sound and deep vibrato emulating the human singing voice. Typically, the strings are plucked by the fingers of the dominant hand, while the steel tone bar is pressed lightly against the strings and moved by the opposite hand.
Dobro is an American brand of resonator guitars owned by Gibson and manufactured by its subsidiary Epiphone. The term "dobro" is also used as a generic term for any wood-bodied, single-cone resonator guitar.
The pedal steel guitar is a console-type of steel guitar with pedals and knee levers that change the pitch of certain strings to enable playing more varied and complex music than other steel guitar designs. Like all steel guitars, it can play unlimited glissandi and deep vibrati—characteristics it shares with the human voice. Pedal steel is most commonly associated with Country music and Hawaiian music.
The lap steel guitar, also known as a Hawaiian guitar or Lap Slide Guitar, is a type of steel guitar without pedals that is typically played with the instrument in a horizontal position across the performer's lap. Unlike the usual manner of playing a traditional acoustic guitar, in which the performer's fingertips press the strings against frets, the pitch of a steel guitar is changed by pressing a polished steel bar against plucked strings. Though the instrument does not have frets, it displays markers that resemble them. Lap steels may differ markedly from one another in external appearance, depending on whether they are acoustic or electric, but in either case, do not have pedals, distinguishing them from pedal steel guitars.
A single-coil pickup is a type of magnetic transducer, or pickup, for the electric guitar and the electric bass. It electromagnetically converts the vibration of the strings to an electric signal. Single-coil pickups are one of the two most popular designs, along with dual-coil or "humbucking" pickups.
A fingerpick is a type of plectrum used most commonly for playing Lap steel guitar and bluegrass style banjo music. Hawaiian steel guitar players invented them to gain a more substantial sound from their instruments. The National Finger Pick was patented on July 20, 1928, by George Beauchamps and John Dopyera. Most fingerpicks are composed of metal or plastic. Unlike flat guitar picks, held between the thumb and finger and used one at a time, fingerpicks clip onto or wrap around the end of the fingers and thumb; thus, one hand can pick several strings at once. Generally, three are used: one for the thumb, middle, and index fingers. Fingerpicks worn on the thumb are called "thumbpicks". Some players use a plastic thumbpick while using metal fingerpicks. Fingerpicks come in various thicknesses to accommodate different musicians' styles of playing. Thin picks produce a quieter, more delicate sound, while thick picks produce a heavier sound. However, thumbpicks come in various styles and employ different materials, as with standard plectrums.
John Dopyera was a Slovak-American inventor and entrepreneur, and a maker of stringed instruments. His inventions include the resonator guitar and important contributions in the early development of the electric guitar.
A solid-body musical instrument is a string instrument such as a guitar, bass or violin built without its normal sound box and relying on an electromagnetic pickup system to directly detect the vibrations of the strings; these instruments are usually plugged into an instrument amplifier and loudspeaker to be heard. Solid-body instruments are preferred in situations where acoustic feedback may otherwise be a problem and are inherently both less expensive to build and more rugged than acoustic electric instruments.
The National String Instrument Corporation was an American guitar company first formed to manufacture banjos and then the original resonator guitars. National also produced resonator ukuleles and resonator mandolins. The company merged with Dobro to form the "National Dobro Company", then becoming a brand of Valco until it closed in 1968.
The Regal Musical Instrument Company is a former US musical instruments company and current brand owned by Saga Musical Instruments. Regal was one of the largest manufacturers in the 1930s and became known for a wide range of resonator stringed instruments, including guitars, mandolins, and ukuleles. Only resonator guitars are sold under the Regal brand today, with manufacturing in Korea and distribution in San Francisco, United States.
An acoustic guitar is a musical instrument in the string family. When a string is plucked, its vibration is transmitted from the bridge, resonating throughout the top of the guitar. It is also transmitted to the side and back of the instrument, resonating through the air in the body, and producing sound from the sound hole. While the original, general term for this stringed instrument is guitar, the retronym 'acoustic guitar' – often used to indicate the steel stringed model – distinguishes it from an electric guitar, which relies on electronic amplification. Typically, a guitar's body is a sound box, of which the top side serves as a sound board that enhances the vibration sounds of the strings. In standard tuning the guitar's six strings are tuned (low to high) E2 A2 D3 G3 B3 E4.
The Rickenbacker Electro A-22, nicknamed the "Frying Pan" is the first electric lap steel guitar, also widely considered the first commercially successful electric guitar. Developed in 1931/1932, it received its patent in August 1937. A previous attempt, the Stromberg company‘s transducer-based "Stromberg Electro", was introduced in 1928. It used a "vibration-transfer rod" from the instrument's sounding board attached to magnets inside the guitar, and was not successful. George Beauchamp created the "Fry-Pan" in 1931, and it was subsequently manufactured by Electro String Instrument Corporation under the name Electro, later named Rickenbacker. The instrument gained its nickname because its circular body and long neck make it resemble a frying pan.
A resonator ukulele or "resophonic ukulele" is a ukulele whose sound is produced by one or more spun aluminum cones (resonators) instead of the wooden soundboard. These instruments are sometimes referred to as "Dobro ukuleles," however the term "Dobro" is currently trademarked by the Gibson Guitar Corporation.
A resonator mandolin or "resophonic mandolin" is a mandolin whose sound is produced by one or more metal cones (resonators) instead of the customary wooden soundboard. These instruments are sometimes referred to as "Dobro mandolins," after pioneering instruments designed and produced by the Dopyera Brothers, which evolved into a brand name. The trademark "Dobro" is currently the property of the Gibson Guitar Corporation. When Gibson acquired the trademark in 1993, they announced that they would defend their right to its exclusive use.
The lap steel ukulele is a type of and method of playing the ukulele