Retribution Gospel Choir, Erik Koskinen and the Farewell Circuit

After last year’s welcome return of his better-known trio, Low, Alan Sparhawk’s continued commitment to Retribution Gospel Choir might have seemed questionable. Not anymore. RGC has come storming back in 2012 with a new mini-collection, “The Revolution EP,” anchored by the power-crunch anthem “The Stone” and three more heavy hitters. You can get it as a free download through the band’s website or on vinyl via Sub Pop Records. The Duluth trio is stopping here on its way home from a seven-city tour. The Farewell Circuit opens. Chris Riemenschneider