Eight-string guitar Novax Guitars. Five of the strings are tuned to the standard guitar's upper five (A, D, G, B, E), while three of the strings are tuned to the standard bass guitar's three lowest (E, A, D). The bass and treble sections have separate pickups and are sent to separate amplifiers. Hunter also has a ten-string guitar based on the same principle—a combination of standard six-string guitar and standard four-string bass. The eight-string guitar is used by modern heavy metal guitarists such as Fredrik Thordendal and Mårten Hagström of Meshuggah, Dino Cazares of Fear Factory, Stephen Carpenter of Deftones, Greg Burgess
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