Strings

A string datatype is a datatype modeled on the idea of a formal string. Strings are such an important and useful datatype that they are implemented in nearly every programming language. In some languages they are available as primitive types and in others as composite types. The syntax of most high-level programming languages allows for a string, usually quoted in some way, to represent an instance of a string datatype; such a meta-string is called a literal or string literal.A variable declared to have a string data type usually causes storage to be allocated in memory that is capable of holding some predetermined number of symbols. When a string appears literally in source code, it is known as a string literal and has a representation that denotes it as such.

Some string instruments have keyboards attached which are manipulated by the player, meaning they do not have to pay attention to the strings directly. The most familiar example is the piano, where the keys control the felt hammers by means of a complex mechanical action. Other string instruments with a keyboard include the clavichord (where the strings are struck by tangents), and the harpsichord (where the strings are plucked by tiny plectra).

With these keyboard instruments too, the strings are occasionally plucked or bowed by hand. Composers such as Henry Cowell wrote music which asks for the player to reach inside the piano and pluck the strings directly, or to "bow" them with bow hair wrapped around the strings, or play them by rolling the bell of a brass instrument such as a trombone on the array of strings.Other keyed string instruments, small enough to be held by a strolling player, include the plucked autoharp, the bowed nyckelharpa, and the hurdy gurdy, which is played by cranking a rosined wheel.

Steel-stringed instruments (such as the guitar, bass, violin, etc.) can be played using a magnetic field. An E-Bow is small hand-held battery-powered device which can be used to excite the strings of an electric guitar. It provides a sustained, singing tone on the string which is magnetically vibrated.

Likewise,3rd Bridge is a plucking method where the string is divided in two pieces and struck at the side which is unamplified. The technique is mainly used on electric instruments, because these have a pickup which amplifies only the local string vibration. It's possible on acoustic instruments as well, but lesser convenient. For instance press on the 7th fret on a guitar and pluck it at the head side and a tone will resonate at the opposed part. At electric instruments this technique can generate multitone sounds remniscent of a clock or a bell.

sitar

The sitar is a plucked stringed instrument predominantly used in Hindustani classical music, where it has been ubiquitous since the Middle Ages. It derives its resonance from sympathetic strings, a long hollow neck and a gourd resonating chamber.The sitar's curved frets are movable, allowing fine tuning, and raised so that sympathetic strings (tarb, also known as "taarif" or "tarafdaar") can run underneath them. A sitar can have 21, 22, or 23 strings, among them six or seven played strings which run over the frets: the Gandhaar-pancham sitar (used by Vilayat Khan and his disciples) has six playable strings, whereas the Kharaj-pancham sitar, used in the Maihar gharana, to which Pt. Ravi Shankar belongs, has seven. Three of these (or four on a Kharaj-pancham sitar), called the chikaari, simply provide a drone: the rest are used to play the melody, though the first string (baajtaar) is most used.

The instrument has two bridges; the large bridge (badaa goraa) for the playing and drone strings and the small bridge (chota goraa) for the sympathetic strings. Its timbre results from the way the strings interact with the wide, sloping bridge. As a string reverberates its length changes slightly as its edge touches the bridge, promoting the creation of overtones and giving the sound its distinctive tone. The maintenance of this specific tone by shaping the bridge is called jawari. Many musicians rely on instrument makers to adjust this.

Materials used in construction include teak wood or tun wood (Cedrela tuna), which is a variation of mahogany, for the neck and faceplate (tabli), and gourds for the kaddu (the main resonating chamber). The instrument's bridges are made of deer horn, ebony, or very occasionally from camel bone. Synthetic material is now common as well. The sitar may have a secondary resonator, the tumbaa, near the top of its hollow neck.

Used throughout the Indian subcontinent, particularly in Northern India, Pakistan, and Bangladesh, the sitar became known in the western world through the work of Pandit Ravi Shankar beginning in the late 1950s, particularly after George Harrison of The Beatles took lessons from Shankar and Shambhu Das[1] and played sitar in songs including "Norwegian Wood (This Bird Has Flown)". Shortly after, The Rolling Stones used a sitar in "Paint It Black" and a brief fad began for using the instrument in pop songs.

The instrument is balanced between the player's left foot and right knee. The hands move freely without having to carry any of the instrument's weight. The player plucks the string using a metallic pick or plectrum called a mizraab. The thumb stays anchored on the top of the fretboard just above the main gourd. Generally only the index and middle fingers are used for fingering although a few players occasionally use the third. A specialized technique called "meand" involves pulling the main melody string down over the bottom portion of the sitar's curved frets, with which the sitarist can achieve a 7 semitone range of microtonal notes (it should be noted, however, that because of the sitar's movable frets, sometimes a fret may be set to a microtone already, and no bending would be required). Adept players bring in charisma through use of special techniques like Kan, Krintan, Murki, Zamzama etc. They also use special Mizrab Bol-s, as in Misrabani and create Chhand-s even in odd-numbered Tal-s like Jhoomra.