Väsen‘s origins are deeply rooted in the centuries-old tradition of the folk music of the Swedish province of Uppland. They perform exquisite string music with virtuosic flair; the sound is by turns winsome, bittersweet, and exhilarating. Väsen is Olov Johansson on nyckelharpa (the remarkable keyed fiddle native to Swedish traditional music), Mikael Marin on viola, and Roger Tallroth on 12-string guitar. There’s a playfulness and improvisation in their music, and an obvious delight in shaping centuries-old tunes into exciting new arrangements. To experience Väsen is to witness ensemble playing at its finest.