Sympathetic strings or resonance strings are auxiliary strings found on many Indian musical instruments, as well as some Western

Baroque The Baroque ( , , ) is a Western Style (visual arts), style of Baroque architecture, architecture, Baroque music, music, Baroque dance, dance, Baroque painting, painting, Baroque sculpture, sculpture, poetry, and other arts that flourished from ...

instruments and a variety of folk instruments. They are typically not played directly by the performer (except occasionally as an effect), only indirectly through the tones that are played on the main strings, based on the principle of

sympathetic resonance Sympathetic resonance or sympathetic vibration is a harmonic phenomenon wherein a passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. The classic example is demonstrated with two similarly-tuned ...

. The resonance is most often heard when the

fundamental frequency The fundamental frequency, often referred to simply as the ''fundamental'' (abbreviated as 0 or 1 ), is defined as the lowest frequency of a Periodic signal, periodic waveform. In music, the fundamental is the musical pitch (music), pitch of a n ...

of the string is in unison or an

octave In music, an octave (: eighth) or perfect octave (sometimes called the diapason) is an interval between two notes, one having twice the frequency of vibration of the other. The octave relationship is a natural phenomenon that has been referr ...

lower or higher than the catalyst note, although it can occur for other intervals, such as a fifth, with less effect.

Description

Sympathetic strings are used to enhance the sound of an instrument. Some instruments have only a few sympathetic strings such as the

Hardanger fiddle A hardanger fiddle () is a traditional stringed instrument considered the national instrument of Norway. In modern designs, this type of fiddle is very similar to the violin, though with eight or nine strings (rather than four as on a standard v ...

(pictured above right). Other instruments which have more include the

sitar The sitar ( or ; ) is a plucked stringed instrument, originating from the Indian subcontinent, used in Hindustani classical music. The instrument was invented in the 18th century, and arrived at its present form in 19th-century India. Khusrau K ...

with 11-13 sympathetic strings and

sarod The sarod is a stringed instrument, used in Hindustani music on the Indian subcontinent. Along with the sitar, it is among the most popular and prominent instruments. It is known for a deep, weighty, introspective sound, in contrast with the sweet ...

with 15 sympathetic strings, and the

sarangi The sārangī is a bowed, short-necked three-stringed instrument played in traditional music from South Asia – Punjabi folk music, Rajasthani folk music, Sindhi folk music, Haryanvi folk music, Braj folk music, and Boro folk music (the ...

, which has a total of 37 sympathetics. In Western music, some members of the

viola The viola ( , () ) is a string instrument of the violin family, and is usually bowed when played. Violas are slightly larger than violins, and have a lower and deeper sound. Since the 18th century, it has been the middle or alto voice of the ...

family appeared in the middle of the 17th century that were fitted with an extra choir of thin wire strings running through a hollow chamber through the

neck The neck is the part of the body in many vertebrates that connects the head to the torso. It supports the weight of the head and protects the nerves that transmit sensory and motor information between the brain and the rest of the body. Addition ...

of the instrument, the head of which was then elongated to accommodate as many extra tuning pegs as necessary. These were generally called

viola d'amore The viola d'amore (; ) is a 7- or 6- stringed musical instrument with additional sympathetic strings used chiefly in the baroque period. It is played under the chin in the same manner as the violin. Structure and sound The viola d'amore shar ...

; another historical example is the

baryton The baryton is a bowed string instrument similar to the viol, but distinguished by an extra set of sympathetic but also pluckable strings. It was in regular use in Europe until the end of the 18th century. Design The baryton can be viewed as a ...

, for which

Haydn Franz Joseph Haydn ( ; ; 31 March 173231 May 1809) was an Austrian composer of the Classical period (music), Classical period. He was instrumental in the development of chamber music such as the string quartet and piano trio. His contributions ...

wrote many

trios Trio may refer to: Music Groups * Trio (music), an ensemble of three performers, or a composition for such an ensemble ** Jazz trio, pianist, double bassist, drummer ** Minuet and trio, a form in classical music ** String trio, a group of three ...

. Other instruments such as the

harp The harp is a stringed musical instrument that has individual strings running at an angle to its soundboard; the strings are plucked with the fingers. Harps can be made and played in various ways, standing or sitting, and in orchestras or ...

lute A lute ( or ) is any plucked string instrument with a neck (music), neck and a deep round back enclosing a hollow cavity, usually with a sound hole or opening in the body. It may be either fretted or unfretted. More specifically, the term "lu ...

guitar The guitar is a stringed musical instrument that is usually fretted (with Fretless guitar, some exceptions) and typically has six or Twelve-string guitar, twelve strings. It is usually held flat against the player's body and played by strumming ...

harpsichord A harpsichord is a musical instrument played by means of a musical keyboard, keyboard. Depressing a key raises its back end within the instrument, which in turn raises a mechanism with a small plectrum made from quill or plastic that plucks one ...

, and

piano A piano is a keyboard instrument that produces sound when its keys are depressed, activating an Action (music), action mechanism where hammers strike String (music), strings. Modern pianos have a row of 88 black and white keys, tuned to a c ...

do not have additional strings, but make use of the effect by allowing their playing strings to vibrate sympathetically when they are not being played directly. In

keyboard instrument A keyboard instrument is a musical instrument played using a keyboard, a row of levers that are pressed by the fingers. The most common of these are the piano, organ, and various electronic keyboards, including synthesizers and digital piano ...

s like the piano, the string dampers can be raised to produce this effect. The

is normally unable to produce effective sympathetic string resonance for tones other than E (resonance from the 6th and 5th strings, tuned to E and A, respectively), B (from the 6th string), D (from the 4th string), and A (from the 5th and 4th strings). The treble strings are negligible in practice, as they are almost constantly being fingered. However, the ten-string guitar invented in 1963 by

Narciso Yepes Narciso Yepes (14 November 19273 May 1997) was a Spanish classical guitar, guitarist. He is considered one of the finest virtuoso classical guitarists of the twentieth century. Biography Yepes was born into a family of humble origin in Lorca, ...

, adds four strings tuned to C, A, G, F, which resolves the imbalance of resonance on the guitar. By adding the abovementioned resonances and, of course, their fifths (the fifth being a strong

resonant frequency Resonance is a phenomenon that occurs when an object or system is subjected to an external force or vibration whose frequency matches a resonant frequency (or resonance frequency) of the system, defined as a frequency that generates a maximu ...

)—that is to say, G, F, D, C—the guitar's strings now resonate more equally with all 12 notes of the

chromatic Diatonic and chromatic are terms in music theory that are used to characterize scales. The terms are also applied to musical instruments, intervals, chords, notes, musical styles, and kinds of harmony. They are very often used as a pair, es ...

scale, bringing the guitar's sound closer to the consistency and sustainability of the

and

.Yepes, Narciso. 1978. "The 10-String Guitar: Overcoming the Limitations of Six Strings". Interview by Larry Snitzler. ''Guitar Player'' 12(3): pp. 26, 42, 46, 48, 52.

Sympathetic string resonance in music instruments

Strings or parts of strings may resonate at their fundamental or

harmonic In physics, acoustics, and telecommunications, a harmonic is a sinusoidal wave with a frequency that is a positive integer multiple of the ''fundamental frequency'' of a periodic signal. The fundamental frequency is also called the ''1st har ...

frequencies when other strings are sounded. In general, non-played strings respond in sympathy to other strings being played. Two tones of the same pitch will give maximum sympathetic resonance as all harmonics of both strings will overlap. Other harmonic combinations will cause sympathetic resonance at the fifth, fourth and major third. For example, an A string at 440 Hz will cause an E string at 330 Hz to resonate, because they share an

overtone An overtone is any resonant frequency above the fundamental frequency of a sound. (An overtone may or may not be a harmonic) In other words, overtones are all pitches higher than the lowest pitch within an individual sound; the fundamental i ...

of 1320 Hz (3 x 440 = 4 x 330 = 1320; third overtone of A and fourth overtone of E).

Tuning

The musician retunes the sympathetic strings for each

mode Mode ( meaning "manner, tune, measure, due measure, rhythm, melody") may refer to: Arts and entertainment * MO''D''E (magazine), a defunct U.S. women's fashion magazine * ''Mode'' magazine, a fictional fashion magazine which is the setting fo ...

raga A raga ( ; , ; ) is a melodic framework for improvisation in Indian classical music akin to a musical mode, melodic mode. It is central to classical Indian music. Each raga consists of an array of melodic structures with musical motifs; and, fro ...

, so that when the corresponding note (or one an octave below it) is played on the main strings of the instrument, the sympathetic strings (called ''tarabs'' in

Indian music Owing to India's vastness and diversity, Indian music encompasses numerous genres in multiple varieties and forms which include classical music, folk, rock, and pop. It has a history spanning several millennia and developed over several ...

) will vibrate in response, providing a lingering halo of sound.

Instruments with sympathetic strings

Banjo The banjo is a stringed instrument with a thin membrane stretched over a frame or cavity to form a resonator. The membrane is typically circular, and in modern forms is usually made of plastic, where early membranes were made of animal skin. ...

Baryton The baryton is a bowed string instrument similar to the viol, but distinguished by an extra set of sympathetic but also pluckable strings. It was in regular use in Europe until the end of the 18th century. Design The baryton can be viewed as a ...

Bazantar The bazantar is a custom made string instrument invented by musician Mark Deutsch, who worked on the design between 1993 and 1997. Overview The Bazantar is a six-string acoustic bass, fitted with an additional twenty-nine sympathetic strings a ...

Crwth :''See Rotte (psaltery), Rotte for the psaltery, or Rotte (lyre), Rotte for the plucked lyre.'' The crwth ( , ), also called a crowd or rote or crotta, is a bowed lyre, a type of string instrument, stringed instrument, associated particularly w ...

* Dilruba *

Esraj The or ''esraaj'' (from the Shahmukhi: اسراج) is a stringed instrument found in two forms throughout South Asia. It is a relatively recent instrument, being only about 300 years old. It is found in Pakistan and North India, primarily Pun ...

* Fender Jaguar * Fender Jazzmaster * Gadulka *

Gottuvadhyam The ''gottuvadyam'' is a 20 or 21-string fretless lute-style veena in Carnatic music from around the late 19th and early 20th centuries, named by Sakha Rama Rao from Tiruvidaimarudur, who was responsible for bringing it back to the concert sc ...

* Gudok * H'arpeggione *

* Herati dutar *

Hurdy-gurdy The hurdy-gurdy is a string instrument that produces sound by a hand-turned crank, rosined wheel rubbing against the strings. The wheel functions much like a violin (or nyckelharpa) bow, and single notes played on the instrument sound similar ...

Kithara The kithara (), Latinized as cithara, was an ancient Greek musical instrument in the yoke lutes family. It was a seven-stringed professional version of the lyre, which was regarded as a rustic, or folk instrument, appropriate for teaching mu ...

(of

Harry Partch Harry Partch (June 24, 1901 – September 3, 1974) was an American composer, music theorist, and creator of unique musical instruments. He composed using scales of unequal intervals in just intonation, and was one of the first 20th-century com ...

) * Koto *Some instruments of the

family * Mohan veena *

Moodswinger The Moodswinger is a twelve-string electric zither with an additional third bridge designed by Yuri Landman. The rod which functions as the third bridge divides the strings into two sections to cause an overtone multiphonic sound. One of the cop ...

* Moonlander *

Nyckelharpa ''Nyckelharpa'' (, roughly "keyed fiddle" in Swedish language, Swedish, , plural: ) is a "keyed" Bowed string instrument, bowed chordophone, primarily originating from Sweden in its modern form, but with its historical roots scattered across med ...

Ondes Martenot The ondes Martenot ( ; , ) or ondes musicales () is an early electronic musical instrument. It is played with a lateral-vibrato Keyboard instrument, keyboard or by moving a ring tied to a wire, creating "wavering" sounds similar to a theremin. D ...

(with Palme diffuseur) * Pencilina *Pianos that use

aliquot stringing Aliquot stringing is the use of extra, un-struck strings in a piano for the purpose of enriching the tone. Aliquot systems use an additional (hence fourth) string in each note of the top three piano octaves. This string is positioned slightly ab ...

Prepared guitar A prepared guitar is a guitar that has had its timbre altered by placing various objects on or between the instrument's strings, including other extended techniques. This practice is sometimes called tabletop guitar, because many prepared guitar ...

Prepared piano A prepared piano is a piano that has had its sounds temporarily altered by placing bolts, screws, mutes, rubber erasers, and/or other objects on or between the strings. Its invention is usually traced to John Cage's dance music for ''Works for pr ...

* Rubab * Samvadini (stringed harmonium) *

Sarangi The sārangī is a bowed, short-necked three-stringed instrument played in traditional music from South Asia – Punjabi folk music, Rajasthani folk music, Sindhi folk music, Haryanvi folk music, Braj folk music, and Boro folk music (the ...

Saraswati Veena The Sarasvatī vīṇa (also spelled Saraswati veena) (, , , Malayalam: സരസ്വതി വീണ) is an ancient Indian plucked veena. It is named after the Hindu goddess Saraswati, who is usually depicted holding or playing the instrume ...

Sarod The sarod is a stringed instrument, used in Hindustani music on the Indian subcontinent. Along with the sitar, it is among the most popular and prominent instruments. It is known for a deep, weighty, introspective sound, in contrast with the sweet ...

Setar A setar (, ) (lit: "Three String (music), Strings") is a stringed instrument, a type of lute used in Persian traditional music, played solo or accompanying voice. It is a member of the tanbur family of long-necked lutes with a range of more than ...

Sitar The sitar ( or ; ) is a plucked stringed instrument, originating from the Indian subcontinent, used in Hindustani classical music. The instrument was invented in the 18th century, and arrived at its present form in 19th-century India. Khusrau K ...

* Springtime * Tambura * Tar (lute) * Taus * Ten-string guitar *

Ukelin The ukelin is a stringed musical instrument made popular in the United States in the 1920s. It is a bowed psaltery with zither strings, and its name derives from the ukulele (which was first made in Portugal but was popularized in Hawaii) and th ...

Viola d'amore The viola d'amore (; ) is a 7- or 6- stringed musical instrument with additional sympathetic strings used chiefly in the baroque period. It is played under the chin in the same manner as the violin. Structure and sound The viola d'amore shar ...

References

{{Authority control Chordophones Timbre

Description

Sympathetic string resonance in music instruments

Tuning

Instruments with sympathetic strings

See also

References