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
Vielle à roue et à manche Vielle à roue et à manche The vielle à roue et à manche (called dulcigurdy by some luthiers) is a modern term for an early music instrument, of unknown original name, of the hurdy-gurdy family, but distinct in that the notes were changed by fingering the neck rather than pressing tangent keys. The instrument has several strings which are constantly bowed by a spinning wheel turned by a crank, producing unbroken musical notes. The instrument is attested on Plate XXII of Praetorius' 1619 treatise Syntagma Musicum. The term "dulcigurdy" is a modern one, a portmanteau of "Appalachian dulcimer" and "hurdy-gurdy".