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 guitar, violin, viola, cello, double bass, banjo, mandolin, ukulele, piano, harpsichord and harp.
Types of instruments
String instruments can be divided in three groups.
It is also possible to divide the instruments in groups focused on how the instrument is played.
Types of playing techniques
All string instruments produce sound from one or more vibrating strings, transferred to the air by the body of the instrument (or by a pickup in the case of electronically amplified instruments). They are usually categorized by the technique used to make the strings vibrate (or by the primary technique, in the case of instruments where more than one may apply.) The three most common techniques are plucking, bowing and striking.
Plucking is used as the sole method of playing on instruments such as the banjo, guitar, harp, lute, mandolin, oud, sitar, and either by a finger or thumb, or by some type of plectrum. This category includes the keyboard instrument the harpsichord, which formerly used feather quills (now plastic plectra) to pluck the strings.
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