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
Music of France iconic hurdy-gurdy and the dance bourrée. There are deep differences between the regions of Central France, with the Auvergne and Limousin retained the most vibrant folk traditions of the area. As an example of the area's diversity, the bourrée can come in either duple or triple meter; the latter is found in the south of the region, and is usually improvised with bagpipes and hurdy-gurdy, while the former is found in the north and includes virtuoso players. The hurdy-gurdy, or "vielle-à-roue", is essentially a mechanical violin, with keys or buttons instead of a finger board. It is made up of