They may look like chamber musicians, but more often than not sound like an old-fashioned, albeit exceptionally skilled folk trio on mandolin (bandleader Mike Marshall), violin (16-year-old Alex Hargreaves), and double bass (21-year-old Paul Kowert). Bluegrass roots bloom into jazz and classical themes, but the underlying sensibilities prove even prodigies can have fun.
Mike Marshall performs at the Freight and Salvage (1111 Addison St., Berkeley) on Apr. 1. 8 p.m., $33.50