String instrument strings, or play them by rolling the bell of a brass instrument such as a trombone on the array of strings. However, these are relatively rarely used special techniques. Other keyed string instruments, small enough for a strolling musician to play, 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 a small hand-held battery-powered device that magnetically excites the strings of an electric string instrument to provide a sustained, singing tone reminiscent
Wheelharp Wheelharp The wheelharp is a musical instrument with bowed strings controlled by a keyboard and foot-controlled motor, similar to Leonardo da Vinci's Viola organista, a keyboard-operated string instrument for continuously sounding strings by rubbing the strings with spinning wheels, powered by a treadle controlled by one foot of the musician. Created by Jon Jones and Mitchell Manger, the wheelharp debuted at the 2013 NAMM Show in Anaheim, California. According to the Wall Street Journal, it "looks and works like a cross between a harpsichord and a hurdy-gurdy: a motor driven wheel spins, rubbing against strings when the player depresses a