Béla Fleck, Edmar Castañeda & Antonio Sánchez BEATrio (Bela Fleck Productions/Thirty Tigers) Ever since he played through the 1980s with bluegrass act New Grass Revival, banjoist Béla Fleck has specialized in making everything he touches sound new — from the futuristic fusion of his Flecktones band through last year’s recreation of George Gershwin’s Rhapsody in...