The integration deepens. Electric viola da gamba player Jenny Eriksson’s Elysian Fields project gave six players of diverse backgrounds a chance to excavate a unique collective sound, and the artistic success always partly depended on how successfully its disparate elements – classical, folk, jazz and early music – could fuse, rather than being parallel streams. The band here achieves that goal on a repertoire of Scandinavian folk music: pieces that readily accommodate the eccentric instrumentation, …