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.{{cite news|last=Lewis|first=Randy|title=A hunt for tickets and celebrities, set to music|url=http://www.latimes.com/entertainment/music/posts/la-et-ms-namm-convention-20130128,0,2061552.story|accessdate=28 January 2013|newspaper=The Los Angeles Times}}

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 key."{{cite web|last=Smith|first=Ethan|title=Da Vinci's Harp And Pakistani Bagpipes: A Day At America's Music Market|url=https://blogs.wsj.com/corporate-intelligence/2013/01/25/da-vincis-harp-and-pakistani-bagpipes-a-day-at-americas-music-market/?KEYWORDS=antiquity+music|publisher=The Wall Street Journal|accessdate=25 January 2013}}

However, the principle of bowed strings in a keyboard instrument is old. Michael Praetorius' Syntagma Musicum depicted a Nürnbergisch Geigenwerk (Geigenklavizimbel).