Hurdy-gurdy twenty-three different forms, and there is still no standardized design today. The six-stringed French "vielle à roue" is the best known and most common sort. A number of regional forms developed, but outside France the instrument was considered a folk instrument and there were no schools of construction that could have determined a standard form. There are two primary body styles for contemporary instruments: guitar-bodied and lute-backed. Both forms are found in French-speaking areas, while guitar-bodied instruments are the general form elsewhere. The box form of the "simphonia" is also commonly found among players of early music and historical re-enactors.
Hurdy-gurdy end. It was around this time that "buzzing bridges" first appeared in illustrations. The buzzing bridge (commonly called the "dog") is an asymmetrical bridge that rests under a drone string on the sound board. When the wheel is accelerated, one foot of the bridge lifts from the soundboard and vibrates, creating a buzzing sound. The buzzing bridge is thought to have been borrowed from the "tromba marina" (monochord), a bowed string instrument. During the late Renaissance, two characteristic shapes of hurdy-gurdies developed. The first was guitar-shaped and the second had a rounded lute-type body made of staves. The lute-like body