The violin is the smallest and highest-pitched instrument in its family, in regular use. Typically having four strings tuned in perfect fifths, violins are most commonly played by drawing a bow across its strings, though they can also be played by plucking the strings. Violins are important instruments in a wide variety of musical genres. They are most prominent in the Western classical tradition and in many varieties of folk music. However, they are also frequently used in jazz, some forms of rock music, and genres of folk including country and bluegrass. Further, they has come to be played in many non-Western music cultures, including Indian and Iranian music. Sometimes informally called a fiddle, regardless of the genre played.