“We used to be cosmic folk, with two acoustic guitars and a violin, but over the course of 2018 we have twisted the knob toward nebulous rock,” says the namesake band leader of Rich Mattson and the Northstars. If genre descriptions fail, think of it this way: Rich Mattson and the Northstars sound as if a photo of a late-fall northern Minnesota cabin became human and started a band. Joining Mattson at the front of the stage on guitars and vocals is Germaine Gemberling. The rhythm section is comprised of Kyle Westrick on bass and Keely Lane on drums. In January they released Totem, the band’s fourth album in as many years.