String instrument rosin than players of lower-pitched instruments, who tend to favor darker, softer rosin. The ravanahatha is one of the oldest string instruments. Ancestors of the modern bowed string instruments are the rebab of the Islamic Empires, the Persian kamanche and the Byzantine lira. Other bowed instruments are the rebec, hardingfele, nyckelharpa, kokyū, erhu, igil, sarangi and K'ni. The hurdy-gurdy is bowed by a wheel. Rarely, the guitar has been played with a bow (rather than plucked) for unique effects. The third common method of sound production in stringed instruments is to strike the string. The piano and hammered dulcimer use
Hurdy-gurdy the instrument has been revived, musicians have used it in a variety of styles of music (see the list of recordings that use hurdy-gurdy), including contemporary forms not typically associated with it. In the eighteenth century, the term "hurdy-gurdy" was also applied to a small, portable "barrel organ" (a cranked box instrument with a number of organ pipes, a bellows and a barrel with pins that rotated and programmed the tunes) that was frequently played by poor buskers (street musicians). Barrel organs require only the turning of the crank to play; the music is coded by pinned barrels, perforated paper