String instrument

Within the taxonomy of musical instruments, string instruments, also known as chordophones, are defined as devices that generate sound through the vibration of strings, actuated by a performer employing various techniques such as strumming, plucking, or striking.

The methods for actuating string instruments are diverse; for example, instruments like guitars are played by plucking strings with fingers or a plectrum, while others, such as violins, are sounded by drawing a bow across them. Certain instruments involve striking the strings, either directly or through mechanisms like light wooden hammers. In specific keyboard instruments, including the harpsichord, a key press initiates the plucking of a string.

In bowed instruments, the performer draws a rosined horsehair bow across the strings to induce vibration. Conversely, with a hurdy-gurdy, the musician rotates a rosined wheel that makes contact with the strings.

Bowed instruments encompass the orchestral string section in Western classical music, specifically the violin, viola, cello, and double bass. Additionally, they include historical instruments such as viols and gambas, prevalent in Baroque early music, and fiddles, common in various folk music traditions. A common technique for all bowed string instruments is "pizzicato," where the strings are plucked with the fingers. The electric guitar employs a diverse array of performance techniques, such as plucking with fingernails or a plectrum, strumming, "tapping" on the fingerboard, and utilizing feedback from a distorted amplifier to achieve sustained tones.

Certain string instruments, including the harp and electric bass, are primarily played by plucking. Further examples comprise the sitar, rebab, banjo, mandolin, ukulele, and bouzouki.

Within organology, the Hornbostel–Sachs system of musical instrument classification designates string instruments as chordophones. Sachs states:

Chordophones are instruments equipped with strings. These strings may be struck with sticks, plucked using bare fingers or a plectrum, bowed, or (as exemplified by the Aeolian harp) sounded by wind. The extensive variety of stringed instruments can be categorized into four fundamental types: zithers, lutes, lyres, and harps.

In most string instruments, string vibrations are transmitted to the instrument's body, which typically features a hollow or enclosed resonant chamber. This body, along with the internal air, subsequently vibrates, thereby amplifying the string's sound for both performer and audience. While most string instruments possess a hollow body for enhanced sound projection, some, like electric guitars and other electronically amplified instruments, may utilize a solid wood body.

Classification

Within musicology, string instruments are formally recognized as chordophones. This category constitutes one of the five primary divisions within the Hornbostel–Sachs system of musical instrument classification.

The Hornbostel–Sachs system categorizes chordophones into two principal groups: those lacking an integral resonator (classified as 31, or "simple") and those possessing such a resonator (classified as 32, or "composite"). While the majority of Western instruments belong to the latter group, the piano and harpsichord are exceptions, falling into the former. The defining criterion for subgroup assignment is whether the resonator can be detached without compromising the instrument's functionality; if so, it is designated as 31. Although it may appear counterintuitive, the piano's casing, which functions as a resonator, can theoretically be removed without destroying the instrument, as its action and strings would remain playable outside the main enclosure. This principle does not apply to the violin, where the strings pass over a bridge situated on the resonator box; consequently, removing the resonator would eliminate string tension.

Curt Sachs further subdivided chordophones into four fundamental categories: zithers, lutes, lyres, and harps.

• The category of zithers encompasses stick zithers, exemplified by the musical bow; tube zithers, which utilize a tube as a resonator, such as the valiha; raft zithers, formed by binding multiple tube zithers into a unified structure; board zithers, including the clavichord, piano, and dulcimer; and long zithers (characterized as a combination of half-tube and board zithers), which include instruments from the Se and Guzheng families.
• Lutes are stringed musical instruments characterized by a body and a neck, which functions both as a handle and as a mechanism for extending the strings beyond the instrument's main structure. This instrument family encompasses not only short-necked plucked lutes such as the lute, oud, pipa, guitar, citole, gittern, mandore, rubab, and gambus, and long-necked plucked lutes like the tanbura, swarabat, bağlama, bouzouki, veena, theorbo, archlute, pandura, sitar, and setar, but also bowed instruments including the Yaylı tambur, rebab, erhu, and the entire family of viols and violins.
• Lyres are distinguished by two arms connected by a yoke or crossbar, with strings stretched between this crossbar and the soundboard. Sachs categorized lyres into two primary types: the box lyre, exemplified by the Greek kithara, and the bowl lyre, which utilized an inverted bowl with a skin soundboard.
• The harp is characterized by strings positioned vertically relative to its soundboard.

Early Stringed Instruments

A cave painting in the Trois Frères cave in France, dated to approximately c. 13,000 BC, is interpreted by some scholars as depicting a musical bow—a hunting bow repurposed as a single-stringed musical instrument. The musical bow is considered a precursor from which various families of stringed instruments evolved; the addition of multiple strings, each producing a distinct note, facilitated the creation of bow harps, harps, and lyres. Subsequently, this development enabled the performance of dyads and chords. Further innovation led to the transformation of the bow harp into the lute, achieved by straightening the instrument and incorporating a bridge to elevate the strings from the neck.

The evolutionary theory linking the musical bow to the harp bow remains a subject of scholarly debate. In 1965, Franz Jahnel critiqued this perspective, asserting that the precise early ancestors of plucked instruments are presently unidentified. Jahnel contended that the harp bow was far removed from the advanced craftsmanship demonstrated by Western Asian civilizations around 4000 BC, which transformed primitive technology into "technically and artistically well-made harps, lyres, citharas, and lutes."

Archaeological excavations in Ancient Mesopotamian sites have unearthed some of the earliest known stringed instruments, such as the lyres of Ur, with artifacts dating back over three millennia. The evolution of lyre instruments necessitated the technological capability to devise a tuning mechanism for adjusting string tension. Wooden-bodied lyres, played by plucking or bowing, are considered pivotal instruments that foreshadowed later harps and violin-family instruments. Furthermore, Indian instruments from 500 BC have been discovered, featuring between 7 and 21 strings. Additionally, a 2,000-year-old single-stringed instrument crafted from deer antler was discovered in Vietnam.

Lutes

Musicologists have presented examples of 4th-century BC instrument technology, referencing surviving engraved images. However, the earliest depiction of a lute-like instrument originates from Mesopotamia, predating 3000 BC. A cylinder seal, currently housed in the British Museum and dated to approximately c. 3100 BC or earlier, illustrates what is believed to be a woman playing a stick lute. Based on these extant images, theorists have categorized Mesopotamian lutes, demonstrating their evolution into distinct long and short varieties. The lineage of long lutes may have subsequently developed into instruments such as the tambur and pandura. Conversely, the short lute lineage underwent further development east of Mesopotamia, specifically in Bactria, Gandhara, and Northwest India, with depictions appearing in sculptures from the 2nd century BC to the 4th or 5th centuries AD.

During the medieval era, the evolution of musical instruments exhibited regional variations across the globe. Middle Eastern rebecs marked significant advancements in instrument design, featuring a half-pear shape and three strings. In contrast, early forms of the violin and fiddle emerged in Europe, influenced by instruments like the gittern—a four-stringed precursor to the guitar—and fundamental lutes. The strings for these instruments were typically fashioned from materials such as catgut (animal intestine) and silk.

From Renaissance to Modernity

The design of stringed instruments underwent significant refinement throughout the Renaissance and into the Baroque period (1600–1750) of musical history. During this time, violins and guitars achieved greater design consistency, bearing a general resemblance to acoustic guitars of the 21st century. Renaissance violins were characterized by intricate woodwork and stringing, while more complex bass instruments like the bandora were developed concurrently with quill-plucked citterns and Spanish-bodied guitars.

The 19th century witnessed the widespread availability of string instruments due to mass production, establishing wooden string instruments as integral components of orchestral ensembles. Instruments such as cellos, violas, and upright basses became standard in chamber groups and smaller orchestras. Concurrently, the guitar of this era predominantly transitioned to six-string configurations, diverging from earlier five-string models.

During the 20th century, significant advancements in string instruments centered on electronic amplification and electronic music. Electric violins, introduced by the 1920s, played a crucial role in the nascent jazz music scene in the United States. While the acoustic guitar was prevalent in blues and jazz, its inherent lack of volume limited its use primarily to accompaniment within rhythm sections, preventing it from functioning as a solo instrument in big bands of the 1920s, unlike louder instruments such as the saxophone and trumpet. The subsequent invention of guitar amplifiers, which integrated a power amplifier and a loudspeaker within a wooden enclosure, enabled jazz guitarists to perform solos audibly over a big band. This innovation paved the way for the development of the electric guitar, an instrument specifically designed for connection to these amplifiers, featuring magnetic pickups, volume control knobs, and an output jack.

The 1960s saw the emergence of larger, more potent guitar amplifiers, colloquially known as "stacks." These formidable amplification systems facilitated guitarists' performances in rock bands within expansive venues, including stadiums and outdoor music festivals. Concurrently, the 1960s and 1970s witnessed the introduction of a diverse array of electronic effects units, frequently packaged as compact stompbox pedals, such as fuzz pedals, flangers, and phasers. These innovations empowered performers to generate distinctive new sounds, particularly during the psychedelic rock movement. Technological advancements in electric guitar and bass, coupled with evolving playing styles, catalyzed significant developments in pop and rock music throughout the 1960s and 1970s. The characteristic sound of the amplified electric guitar became central to emerging genres like blues rock and jazz-rock fusion. Furthermore, the immense sonic power of the loudly amplified, highly distorted electric guitar served as a foundational element of early heavy metal music, where distorted guitar was employed for lead roles and power chords defined rhythm guitar.

The continuous integration of electronic amplification and effects units across string instruments, from traditional violins to modern electric guitars, has enriched contemporary classical music performances. This integration has also facilitated extensive experimentation with the dynamic and timbral (tone color) ranges available to orchestras, bands, and solo performers.

Instrument Classifications

Structural Design

String instruments are broadly categorized into three principal groups:

Lutes

Instruments characterized by strings supported by both a neck and a bout (resonating body), exemplified by the guitar, violin, or saz.

Harps

Instruments featuring strings enclosed within a structural frame.

Zithers

Instruments whose strings are affixed to a body, frame, or tube, including examples such as the guqin, cimbalom, autoharp, harpsichord, piano, or valiha.

Alternatively, instruments may be classified based on their primary playing technique.

Performance Techniques

All string instruments generate sound through the vibration of one or more strings, with this vibration subsequently transmitted to the air by the instrument's body or, in electronically amplified instruments, by a pickup. Classification typically relies on the method employed to induce string vibration, or the predominant method if multiple techniques are applicable. The three most prevalent techniques are plucking, bowing, and striking. A critical distinction between bowing and plucking lies in the periodic nature of bowing, which maintains the overtones in a precisely harmonic relationship to the fundamental frequency.

Plucking

Plucking constitutes a performance method for instruments such as the veena, banjo, ukulele, guitar, harp, lute, mandolin, oud, and sitar, involving the use of a finger, thumb, or quills (presently plastic plectra) to activate the strings.

Instruments typically played with a bow may also be plucked, a technique designated by the Italian term pizzicato.

Bowing

Bowing, known in Italian as arco, represents a fundamental technique for sound production on various string instruments, encompassing the violin, viola, cello, double bass (all members of the violin family), and the historical viol family. The bow itself comprises a stick fitted with a ribbon of parallel horsehair strands tensioned between its extremities. This horsehair is treated with rosin, a substance that enhances its grip on the strings. The act of drawing the rosined hair across a string initiates a stick-slip phenomenon, which induces string vibration and consequently generates sound from the instrument. Rosin varieties with darker grades offer superior grip in cooler, drier environments but can become excessively adhesive in warmer, more humid conditions. Typically, violin and viola performers opt for harder, lighter-colored rosin, whereas musicians playing lower-pitched instruments generally prefer darker, softer formulations.

Among the most ancient string instruments is the ravanahatha. The lineage of contemporary bowed string instruments can be traced back to the rebab from Islamic Empires, the Persian kamanche, and the Byzantine lira. Additional bowed instruments include the rebec, hardingfele, nyckelharpa, kokyū, erhu, igil, sarangi, morin khuur, and K'ni. Uniquely, the hurdy-gurdy produces sound through a rotating wheel that bows its strings. On rare occasions, the guitar has been played with a bow, rather than being plucked, to achieve distinctive sonic effects.

Striking

The third prevalent method for generating sound on stringed instruments involves striking the strings. Both the piano and the hammered dulcimer exemplify this technique. Despite the piano's percussive action on its strings, the incorporation of felt hammers results in a mellow and rounded tonal quality, which contrasts sharply with the abrupt attack produced by a harder striking mechanism.

Performers on violin family instruments are sometimes directed to strike the strings with the wooden stick of the bow, a technique designated as col legno. This method generates a percussive sound in conjunction with the note's fundamental pitch. A notable instance of col legno application in orchestral string sections is found in Gustav Holst's "Mars" movement from The Planets suite.

Alternative Methods

The aeolian harp utilizes a highly distinctive method of sound generation, wherein its strings are vibrated by the kinetic energy of moving air.

Certain string instruments incorporate an integrated keyboard, allowing the performer to depress keys that activate a mechanism to sound the strings, rather than engaging in direct manipulation. Examples include the piano, clavichord, and harpsichord. On these keyboard instruments, manual plucking or bowing of the strings is occasionally employed. Contemporary composers, such as Henry Cowell, have composed pieces that necessitate performers reaching into the piano to pluck strings directly, 'bow' them using bow hair wrapped around the strings, or produce sound by rolling the bell of a brass instrument, such as a trombone, across the string array. Nevertheless, these represent specialized techniques that are infrequently utilized.

Additional keyed string instruments, designed for portability and suitable for itinerant musicians, encompass the plucked autoharp, the bowed nyckelharpa, and the hurdy-gurdy, which is operated by rotating a rosined wheel.

Steel-stringed instruments, including guitars, basses, and violins, can also be played through the application of a magnetic field. The E-Bow, a compact, handheld, battery-powered device, magnetically excites the strings of an electric string instrument, thereby producing a sustained, resonant tone akin to a prolonged bowed violin note.

The 'third bridge' technique involves a plucking method where the performer frets a string and then strikes the segment of the string located on the side opposite the primary bridge. This technique is predominantly employed on electric instruments due to their pickups, which are designed to amplify localized string vibrations. While feasible on acoustic instruments, its effectiveness is considerably diminished. For example, a guitarist might depress a string at the seventh fret and pluck it on the headstock side, causing a tone to resonate from the segment beyond the bridge. On electric instruments, this technique produces complex, multi-tonal sounds evocative of chimes or bells.

Electric string instruments, notably the electric guitar, can also be played without direct physical contact with the strings through the utilization of audio feedback. When an electric guitar is connected to a powerful, high-volume amplifier equipped with a loudspeaker, and a significant degree of distortion is deliberately applied, the instrument generates sustained, high-pitched tones. By manipulating the guitar's distance from the speaker, the musician can create unique sounds unattainable through conventional plucking and picking methods. This technique gained prominence with Jimi Hendrix and other artists during the 1960s and became a hallmark of psychedelic rock and heavy metal genres.

Modifying the Pitch of a Vibrating String

The pitch of a vibrating string can be altered through three primary methods. While string instruments are typically tuned by adjusting string tension, as modifying length or linear density is often impractical for this purpose, instruments with fingerboards allow players to alter pitch by changing the vibrating segment's length. These principles are based on the theoretical model of an infinitely flexible string anchored between two fixed supports. In reality, strings exhibit finite curvature at the bridge and nut, and the bridge's movement prevents it from functioning as a precise vibrational node. Consequently, the subsequent proportional relationships should be considered approximations.

String Length

The pitch produced by a string can be modified by altering its effective length. Specifically, an increase in string length yields a lower pitch, whereas a reduction in length produces a higher pitch. For instance, concert harps incorporate pedals that engage a rigid mechanism to shorten a string's vibrating segment during performance. This relationship is mathematically expressed as an inverse proportionality between frequency and length:

f ∝<!-- ∝ --> §1314§ l {\displaystyle f\propto {\frac {1}{l}}}

Consequently, doubling a string's length results in a tone with half the frequency, corresponding to a one-octave decrease in pitch.

String Tension

Varying the tension applied to a string also enables pitch modification. Reduced tension (a looser string) yields a lower pitch, whereas increased tension (a tighter string) produces a higher pitch. On a pedal steel guitar, depressing a pedal elevates the pitch of specific strings by mechanically increasing their tension (stretching them); releasing the pedal restores the original pitch. Similarly, knee levers on the same instrument can lower pitch by releasing and subsequently restoring string tension. Even a rudimentary washtub bass, constructed from a rope, broomstick, and washtub, demonstrates this principle: increasing rope tension generates a higher pitch, while decreasing it results in a lower pitch. Mathematically, frequency is directly proportional to the square root of the tension:

${\displaystyle f\propto {\sqrt {T}}}$

Linear Density

The pitch of a string can also be modified by altering its linear density, defined as its mass per unit length. In practical contexts, such as with double bass or bass piano strings, additional mass is incorporated by winding them with metal. A string featuring a heavier metal winding will generate a lower pitch compared to an unwound string of identical length. This principle is exemplified by a set of 2016-era double bass gut strings. The higher-pitched G string is typically constructed from synthetic materials or animal intestine, lacking any metal wrapping. Conversely, to achieve a significantly lower pitch from the low E string while maintaining the same length, it is extensively wrapped with fine metal wire. This process increases its mass without unduly compromising its flexibility. The frequency exhibits an inverse proportionality to the square root of the linear density:

f ∝<!-- ∝ --> §1314§ μ {\displaystyle f\propto {1 \over {\sqrt {\mu }}}}

Consequently, when comparing two strings of identical length and tension, the string possessing a greater mass per unit length will generate a lower pitch.

String Length and Scale Length

The effective string length, measured from the nut to the bridge on bowed or plucked instruments, fundamentally dictates the intervallic spacing of notes. For instance, a double bass, characterized by its low register, typically requires a scale length of approximately 42 inches (110 cm), whereas a violin's scale is considerably shorter, at about 13 inches (33 cm). This disparity in scale length impacts playability: on the violin's shorter scale, a performer's left hand can readily access a range exceeding two octaves without positional shifts, whereas on the bass's extended scale, only a single octave or a ninth is typically accessible in lower positions.

Contact Points Along the String

Standard bowing technique on bowed instruments involves positioning the bow perpendicularly to the string, typically midway between the fingerboard's end and the bridge. Nevertheless, varying the bow's placement allows for timbral modification. When the bow is applied near the bridge, a technique termed sul ponticello, it generates an intense, occasionally abrasive sound that acoustically accentuates the upper harmonics. Conversely, bowing over the fingerboard, known as sul tasto, yields a purer tone with reduced overtone prominence, thereby emphasizing the fundamental frequency. This effect is also referred to as flautando due to its less reedy, more flute-like acoustic quality.

The construction of bowed instruments presents a unique challenge for instrument makers, particularly when contrasted with instruments solely designed for plucking, such as the guitar. This difficulty arises because musicians require the ability to articulate individual strings on bowed instruments. Consequently, a bowed instrument necessitates a curved bridge, which positions the outer strings at a lower height than the inner strings. This curvature facilitates the player's selection and bowing of a single string. In contrast, instruments like guitars and lutes can feature a flat bridge, as their strings are activated by plucking with fingers, fingernails, or a pick, allowing players to select different strings by repositioning their hand or pick. The requirement for individual string articulation with a bow also constrains the number of strings on bowed instruments, typically to around six or seven; exceeding this number would impede the ability to isolate individual strings for bowing. (It is noteworthy that bowed instruments can simultaneously produce two bowed notes on different strings, a technique known as a double stop.) Most orchestral string instruments commonly feature four strings, with some double basses being an exception, utilizing five. Conversely, stringed keyboard instruments, such as the piano, employ 88 courses of strings. Despite these strings being arranged on a flat bridge, the instrument's mechanism enables the individual activation of any note.

Analogous timbral variations can be achieved on plucked string instruments through the deliberate selection of a plucking point, though these distinctions may be less pronounced.

For keyboard instruments, the precise point of contact along the string—whether by a hammer, tangent, or plectrum—is a deliberate design decision made by the instrument's creator. Manufacturers integrate empirical experience with principles of acoustic theory to determine the optimal configuration of these contact points.

Harpsichords frequently incorporate two sets of strings of identical length, referred to as "choirs." These choirs typically diverge in their plucking points. One choir employs a standard plucking position, yielding the characteristic harpsichord timbre, while the other utilizes a plucking point nearer to the bridge, which generates a reedier, "nasal" sound abundant in upper harmonics.

Generation of Multiple Pitches

A singular string, under specific tension and length, is capable of producing only one distinct pitch. To achieve a broader range of notes, string instruments employ one of two primary mechanisms. The first involves incorporating a sufficient number of strings to encompass the desired tonal spectrum, exemplified by the piano, which features 88 strings to allow for 88 different notes. The second approach entails a mechanism to stop the strings along their length, thereby shortening the vibrating segment. This latter method is characteristic of instruments such as guitars and those in the violin family, enabling the production of various notes from a single string. The piano and harp illustrate the first method, where each individual note on the instrument corresponds to its own string or a course of multiple strings tuned to the same pitch. (Many piano notes are equipped with a "choir" of three identically tuned strings to augment volume.) The guitar exemplifies the second method, where the performer's fingers press the string against the fingerboard, firmly engaging it with a metal fret. This action of pressing the string against a fret during plucking or strumming effectively shortens the vibrating portion, consequently generating a different note.

Zithers can feature a combination of stoppable melody strings and a larger complement of open harmony or chord strings. Instruments equipped with stoppable strings, like the violin or guitar, enable performers to reduce the vibrating length of a string either directly with their fingers or, less commonly, via mechanical mechanisms, as observed in the nyckelharpa and hurdy-gurdy. Typically, such instruments incorporate a fingerboard affixed to the neck, offering a rigid, flat surface against which the player can press the strings. Certain string instruments feature a fingerboard with frets—elevated ridges oriented perpendicularly to the strings—which precisely define stopping points for the strings; in these instances, the fingerboard is also known as a fretboard.

Adjusting frets during a musical performance is generally unfeasible. Conversely, the bridges of a koto can be repositioned by the musician periodically throughout a single composition. Numerous contemporary Western harps incorporate levers, actuated either directly by fingers (in Celtic harps) or controlled by foot pedals (in orchestral harps), to elevate the pitch of specific strings by a predetermined increment. The qanun, a Middle Eastern zither, features small levers known as mandal, which permit the incremental, real-time retuning of each multi-string course during play. These levers facilitate microtonal adjustments, altering the pitch of a string course by less than a semitone.

Sympathetic Strings

Certain instruments incorporate sympathetic strings, which are supplementary strings not intended for direct plucking. These strings resonate in conjunction with the actively played notes, thereby generating additional harmonic overtones. Sympathetic strings naturally vibrate when intervals such as unisons or octaves of their own notes are plucked, bowed, or struck. This resonant system is employed in instruments like the sarangi, grand piano, Hardanger fiddle, and rubab.

Sound Production

Acoustic Instruments

A hypothetical vibrating string stretched across a substantial log would produce only a faint sound; consequently, string instruments are typically designed to couple the vibrating string with either a hollow resonating chamber, a soundboard, or both. For instance, on a violin, the four strings traverse a slender wooden bridge positioned atop a hollow box, which constitutes the instrument's body. The normal force exerted by the strings onto the body is partially sustained by a small wooden cylinder known as the soundpost. Additionally, the violin body features two "f-holes" carved into its top surface. The vibrations from the strings are disseminated through the bridge and soundpost to all structural components of the instrument, thereby amplifying the sound through acoustic impedance matching. More precisely, these elements facilitate a more effective match with the acoustic impedance of the surrounding air.

While it is occasionally stated that a sounding board or soundbox "amplifies" string sound, true power amplification does not occur, as the entire energy for sound production originates from the vibrating string itself. The actual mechanism involves the instrument's sounding board presenting a significantly larger surface area for generating sound waves compared to the string alone, thereby functioning as an impedance matching element between the string's acoustic impedance and that of the ambient air. A more expansive vibrating surface can often achieve superior impedance matching, particularly at lower frequencies.

Traditionally, all lute-family instruments incorporate a bridge, which maintains the strings at the appropriate action height relative to the fretboard or fingerboard at one end. In acoustic instruments, the bridge serves an equally critical role by transmitting string energy into the instrument's "sound box," consequently augmenting the overall sound volume. The particular design and material composition of an instrument's bridge significantly influence both its tonal characteristics and responsiveness.

The development of tonal characteristics that are both acoustically effective and aesthetically pleasing to performers and audiences represents a synthesis of art, craft, and scientific principles. Consequently, string instrument manufacturers frequently source premium woods for this purpose, notably spruce (valued for its lightness, strength, and flexibility) and maple (a highly dense wood). Spruce is commonly employed for the soundboards of various instruments, ranging from violins to pianos. Conversely, instruments like the banjo utilize a drum, typically covered with natural or synthetic skin, as their soundboard.

Acoustic instruments may also be constructed from synthetic materials, including carbon fiber and fiberglass, especially for larger, lower-pitched instruments like cellos and basses.

During the early 20th century, the Stroh violin employed a diaphragm resonator and a metallic horn to project its string sound, akin to early mechanical gramophones. Its adoption diminished around 1920 with the advent and widespread use of electronic amplification via power amplifiers and loudspeakers. Contemporary string instrument performers can electronically amplify their instruments by interfacing them with a public address (PA) system or a guitar amplifier.

Electronic Amplification

The majority of string instruments can be equipped with piezoelectric or magnetic pickups, which transform string vibrations into an electrical signal. This signal is subsequently amplified and reconverted into sound by loudspeakers. Some musicians affix a pickup to their conventional string instrument to achieve an "electrified" sound. An alternative approach involves utilizing a solid-bodied instrument, which effectively mitigates undesirable feedback howls or squeals.

Amplified string instruments possess significantly greater volume than their acoustic equivalents, enabling musicians to integrate them into louder rock, blues, and jazz ensembles. Furthermore, the amplified tone of these instruments can be modulated through electronic effects, including distortion, reverb, or wah-wah.

Bass-register string instruments, including the double bass and electric bass, are amplified using specialized bass instrument amplifiers engineered to reproduce low-frequency audio. To alter the tonal characteristics of amplified bass instruments, various electronic bass effects, such as distortion and chorus, are accessible.

Symphonic Strings

The string instruments typically employed within an orchestra, frequently referred to as "symphonic strings" or the string section, include:

• Violins (categorized into two sections: first violins and second violins; both sections utilize identical instruments, with the distinction lying in the first violins performing higher-register melodic lines and the second violins executing lower-register parts, accompaniment, or counter-melodies)
• Violas
• Cellos
• Double Basses

When orchestral scoring indicates "strings," it generally refers to this specific combination of string parts. While orchestral compositions seldom exclude any of these string components, they frequently incorporate supplementary string instruments, notably the concert harp and piano. Within Baroque orchestras from the 17th to mid-18th centuries (or in contemporary ensembles performing early music), the harpsichord almost invariably provides the basso continuo part, comprising a written bass line and improvised chords, often alongside a theorbo, lute, or pipe organ. In certain classical genres, such as the string quartet, the double bass is typically absent, with the cello assuming the bass role.

• "Essay on the fingering of the violoncello and on the conduct of the bow"
• Luthier (maker of stringed instruments)
• Ravanahatha
• String instrument repertoire
• Stringed instrument tunings

References

• Savart Journal Archived 2021-04-21 at the Wayback Machine, an online resource published in collaboration with the Guild of American Luthiers.
• Instruments in Depth: The Viola, an online feature presented by Bloomingdale School of Music (2010)
• Chisholm, Hugh, ed. (1911). "Stringed instruments" . Encyclopædia Britannica (11th ed.). Cambridge University Press.Source: TORIma Academy Archive