Editing Sympathetic string (section)

==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]]  (pictured above right). Other instruments which have more include the [[sitar]] with 11-13 sympathetic strings and [[sarod]] with 15 sympathetic strings, and the [[sarangi]], which has a total of 37 sympathetics. 

In [[Classical music|Western music]], some members of the [[viola]] 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 (music)|neck]] 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]]; another historical example is the [[baryton]], for which [[Joseph Haydn|Haydn]] wrote many [[Ternary form|trios]]. 

Other instruments such as the [[harp]], [[lute]], [[guitar]], [[harpsichord]], and [[piano]] 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]]s like the piano, the string dampers can be raised to produce this effect.

The [[guitar]] 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#Yepes' ten-string guitar|ten-string guitar]] invented in 1963 by [[Narciso Yepes]], adds four strings tuned to C, A{{music|sharp}}, G{{music|sharp}}, F{{music|sharp}}, 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]])&mdash;that is to say, G, F, D{{music|sharp}}, C{{music|sharp}}&mdash;the guitar's strings now resonate more equally with all 12 notes of the [[chromatic]] scale, bringing the guitar's sound closer to the consistency and sustainability of the [[harpsichord]] and [[piano]].<ref>Ramirez III, Jose. 1994. "The Ten-String Guitar" in Things About the Guitar. Bold Strummer. pp. 137-141. {{ISBN|8487969402}}</ref><ref>Yepes, Narciso. 1981 "Narciso Yepes and His 10-String Guitar". Interview-Article by Allan Kozinn. The New York Times, Nov. 22: p. D21
</ref><ref>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.</ref>