David Grisman For nearly half a century, mandolinist / composer / bandleader / producer David Grisman has been a guiding force in the evolving world of acoustic music. His musical range is wide and deep — embracing many styles, genres and traditions. Grisman has revisited his roots with the David Grisman Bluegrass Experience (DGBX). This very traditional group includes Keith Little on 5-string banjo, guitar and vocals, Jim Nunally on guitar and vocals, Chad Manning on fiddle, Samson Grisman on bass, with David on mandolin and vocals. Sierra Hull There aren’t many twenty three year old musicians that can say they’ve had a career that’s already spanned more than a decade, and there aren’t many at any age that can compare resumes with Sierra Hull. Boundaries—age, genre or otherwise—don’t hamper an artist like Sierra. Matt Glaser—head of Berklee’s American Roots Music Program—put it this way: “She has no limitations as a musician.”