The banjo can be played in several styles and is used in various forms of music. In bluegrass music, which uses the five-string banjo extensively, it is often played in [Scruggs style]?. [American old-time]? music also typically uses the 5-string banjo, but it is played in different styles, notably  claw-hammer? or frailing?.  Another characteristic of old-time banjo styles is the use of a wide range of different tunings.    The plectrum banjo evolved out of the 5-string banjo to cater for styles of music involving strummed chords.  A further development is the tenor banjo, which also has four strings and is typically played with a plectrum.  It is usually tuned CGDA, like a viola, or GDAE, like a violin (but an octave lower), and has become quite a standard instrument for Irish traditional music.
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