2019-6-19 · Väsen is a Swedish folk music band from Uppsala originally consisting of Olov Johansson (nyckelharpa), Mikael Marin (viola) and Roger Tallroth (guitar). Later André Ferrari (percussion) also joined the group. As of 2019[update] they have released 19 albums, featured on others, and have toured every year also outside of Europe. Since 2002 ...