The authority on contemporary accordion performance, Frode Haltli performs at the Transformer Station tonight at 7:30. You won’t hear any polka at this concert. Haltli specializes in contemporary concert music, avant-garde and folk performance on an instrument that’s highly underrated in its versatility in the concert hall. Over the years, the accordionist has recorded more than 10 albums of music and premiered more than 100 new works, demonstrating an expansive technique and virtuosic flare. The Norwegian artist will perform works by Hans Abrahamsen, Magnar Åm, Arne Nordheim and Aldo Clementi. Tickets are $20. (Gonzalez)