Bluegrass banjo is characterized by a hard-driving, forceful picking-hand approach. Developing good timing is essential to great playing, and you'll want to practice these rolls slowly at first, keeping a steady rhythm. As you encounter new songs, take note of the many ways that roll patterns are used to capture melodies.
Forward-reverse roll

Alternating thumb roll

Forward roll

Lick roll

Foggy Mountain roll

Backward roll

Middle leading/Osborne roll

Index leading roll
