Mr Sun comprises 3 generations of some of the sharpest minds to apply themselves to the American String Band. Legendary fiddler Darol Anger is at home in a number of musical genres, some of which he helped to invent, and represents the original “nuclear” generation of pickers who extended Bluegrass, Jazz, and Classical music to find their common ground. Joe K. Walsh is recognized as one of the foremost contemporary mandolinists. Grant Gordy is a standout in the crowded field of Acoustic Guitar Wunderkinds. The group recently added the spectacular young bassist Ethan Jodziewicz, who currently studies at Curtis Institute with Edgar Meyer. The 4 musical points-of-view in Mr Sun are so strong and personal that one might imagine the group could explode but for the palpable love and humor that emanate from every note they play. At One Longfellow Square. 8-10:30pm. $20 adv./$25 day of. FMI: onelongfellowsquare.com.