Violin completely losing tension. A violin in which the tuning pegs are slipping needs to be repaired by a luthier or violin repairperson. Peg dope or peg compound, used regularly, can delay the onset of such wear, while allowing the pegs to turn smoothly. The tuning G–D–A–E is used for most violin music, both in Classical music, jazz and folk music. Other tunings are occasionally employed; the G string, for example, can be tuned up to A. The use of nonstandard tunings in classical music is known as "scordatura"; in some folk styles, it is called "cross tuning". One famous example
Electric violin Braia, Kernunna, Carol Carolo, Os Minervas, Leonardo Araujo, Transfonika Orkestra, Sagrado Coração da Terra, and others. In the mid-1980s, Zeta Music developed a prototype violin for Laurie Anderson that, through the employment of a custom pickup and a conversion module, sent MIDI data, allowing the violinist to control synthesizers. This design was later refined and turned into a commercial product. Unlike most pickup designs, the Zeta pickup has the ability to output the signal from each string on a separate audio channel. Using a multi-pin cable to their pitch-to-MIDI interface, this allows for polyphonic MIDI control with each string set