A string instrument (or stringed instrument) is a musical instrument that produces sound by means of vibrating strings. In the Hornbostel-Sachs scheme of musical instrument classification, used in organology, they are called chordophones. The most common string instruments in the string family are violin, cello, viola, double bass, mandolin, banjo, guitar, and harp.
Bowing: (Italian: Arco) is a method used in some string instruments, including the violin, viola, cello, and less commonly, the double bass etc. The bow consists of a stick with many hairs stretched between its ends. Bowing the instrument's string causes a stick-slip phenomenon to occur, which makes the string vibrate.
BERIMBAU:
Bowing: (Italian: Arco) is a method used in some string instruments, including the violin, viola, cello, and less commonly, the double bass etc. The bow consists of a stick with many hairs stretched between its ends. Bowing the instrument's string causes a stick-slip phenomenon to occur, which makes the string vibrate.
BERIMBAU:
The berimbau is a single-string percussion instrument, a musical bow, from Brazil. The berimbau's origins are not entirely clear, but there is not much doubt on its African origin.

The berimbau, as played for capoeira, basically has three sounds: the open string sound, the high sound, and the buzz sound.
CELLO:
CELLO:
A person who plays a cello is called a cellist. The cello is used as a solo instrument, in chamber
music, and as a member of the string section of an orchestra. It is the second physically largest member of the violin family of musical instruments, next to the double bass.
The cello is most closely associated with European classical music, and has been described as the closest sounding instrument to the human voice.The instrument is a part of the standard orchestra and is the bass voice of the string quartet, as well as being part of many other chamber groups. A large number of concertos and sonatas have been written for the cello. The instrument is less common in popular music, but is sometimes featured in pop and rock recordings. The cello has also recently appeared in major hip-hop and R & B performances, such as singers Rihanna and Ne-Yo's performance at the American Music Awards.The instrument has also been modified for Indian classical music by Nancy Lesh and Saskia Rao-de Haas.

The cello is most closely associated with European classical music, and has been described as the closest sounding instrument to the human voice.The instrument is a part of the standard orchestra and is the bass voice of the string quartet, as well as being part of many other chamber groups. A large number of concertos and sonatas have been written for the cello. The instrument is less common in popular music, but is sometimes featured in pop and rock recordings. The cello has also recently appeared in major hip-hop and R & B performances, such as singers Rihanna and Ne-Yo's performance at the American Music Awards.The instrument has also been modified for Indian classical music by Nancy Lesh and Saskia Rao-de Haas.
DILRUPA:
The dilrupa is a bowed musical instrument from India.
DOTAR:

The dutar has a warm, dulcet tone. Typical sizes for the pear-shaped instrument range from one to two meters.
DOUBLE BASS:

Double basses are constructed from several types of wood, including maple for the back, spruce for the top, and ebony for the fingerboard. It is uncertain whether the instrument is a descendant of the viola da gamba or from the violin, but it is traditionally considered to be a member of the violin family. While the double bass is nearly identical in construction to the other violin family instruments, it also has features which may be derived from the viols.
EKTARA:

In origin the ektara was a regular string instrument of wandering bards and minstrels from India and is plucked with one finger. The ektara usually has a stretched single string, an animal skin over a head (made of dried pumpkin/gourd, wood or coconut) and pole neck or split bamboo cane neck.
ERHU:

The erhu consists of a long vertical stick-like neck, at the top of which are two large tuning pegs, and at the bottom is a small resonator body (sound box) which is covered with python skin on the front (playing) end. Two strings are attached from the pegs to the base, and a small loop of string (qian jin) placed around the neck and strings acting as a nut pulls the strings towards the skin, holding a small wooden bridge in place.
HURDY GURDY:

RAVANHATHA:

Ravanahatha is known as the first musical instrument with strings to be played with a bow and recognised as the world's first violin.[citation needed] According to the legend, Ravana was an ardent devotee of the Hindu god Shiva. Ravana served Shiva using the soulful music emanating from the ravanahatha.[citation needed]
After the 11th century, the ravanahatha underwent many changes and it took the shape of the modern violin in Italy in the 16th century.[citation needed]
The ravanahatha's birth itself is believed to have taken place under traumatic circumstances. According to legend, Ravana's mother Kaikasi, an ardent devotee of Shiva, was eager to go and live in the god's abode on Mount Kailash in the Himalayas. Ravana opposed the plan vehemently, but to please his mother he promised to bring Mount Kailash itself to Sri Lanka.
REBEC:

The number of strings on the rebec varies from one to five, although three is the most common number. The strings are often tuned in fifths, although this tuning is by no means universal. The instrument was originally in the treble range, like the violin, but later larger versions were developed, such that by the 16th century composers were able to write pieces for consorts of rebecs, just as they did for consorts of viols.
SARANGI:

Important bowed string instrument of India's Hindustani classical music tradition.
Carved from a single block of wood, the sarangi has a box-like shape, usually around two feet long and around half a foot wide. The lower resonance chamber is made from a hollowed-out block of tun (red cedar) wood and covered with parchment and a decorated strip of leather at the waist which supports the elephant-shaped bridge. The bridge in turn supports the huge pressure of approximately 40 strings.
SARINDA:

A sarinda is a stringed Indian folk musical instrument similar to lutes or fiddles. It is played with a bow and has three strings. The bottom part of the front of its hollow wooden soundbox is covered with animal skin. It is played while sitting on the ground in a vertical orientation.
The tribes of India, e.g. Tripuris, find use of sarinda in their traditional music and dance. It is the sole accompany for a solo or group folk singer(s).
VIOLIN:

The violin is sometimes informally called a fiddle, regardless of the type of music played on it. The word "violin" comes from the Middle Latin word vitula, meaning "stringed instrument";this word is also believed to be the source of the Germanic "fiddle".The violin, while it has ancient origins, acquired most of its modern characteristics in 16th-century Italy, with some further modifications occurring in the 18th century. Violinists and collectors particularly prize the instruments made by the Stradivari, Guarneri and Amati families from the 16th to the 18th century in Cremona.
A person who makes or repairs violins is called a luthier, or simply a violin maker. The parts of a violin are usually made from different types of wood (although electric violins may not be made of wood at all, since their sound may not be dependent on specific acoustic characteristics of the instrument's construction), and it is generally strung with gut or steel strings.
Someone who plays the violin is called a violinist or a fiddler. He or she produces sound from a violin by either drawing a bow (normally held in the right hand) across one or more strings (which may be stopped by the fingers of the other hand to produce a full range of pitches), plucking the strings (with either hand), or a variety of other techniques. The violin is played by musicians in a wide variety of musical genres, including Baroque music, classical, jazz, folk and traditional, and rock and roll.