Roll: The 5 string banjo roll typically will only use four out of 5 strings, also other than using just 3 that are used to play the forward and backward rolls. The mixed roll: The mixed roll is also known by the names of ‘the thumb-in-and-out’ or ‘alternating thumb’ roll, this pattern is neither ascending or descending. This roll technique also uses all 5 strings. Also, the thumb will play every other note. "The word roll has different meanings for different kinds of musicians. To guitar players, a roll is a broken chord; to bluegrass-banjo players..." Rolls may start at any point in the pattern or, in other words, on any finger. See also "Shave and a Haircut" G run Chop chord Crosspicking Drum roll Sources Bluegrass music String performance techniques