A little over a year ago, Minnesota Public Radio bought a competing classical music station in the Twin Cities and changed its format, much to the consternation of some classical music fans in the area. But in the year since MPR launched the station now known as The Current, it has been the talk of the local radio scene. With its DJs picking the songs they play, focusing on local rock bands and national acts that don’t get the time of day on most corporate-controlled FM stations, the station has cultivated a seriously loyal following, and affected nearly everything about the music scene in the Cities.