Alpine music — and more specifically Polka and Oberkrainer — are considered ancient German. But what many people don't know is that the origin is not in the Bavarian or Swiss Alps but in Slovenia.

River City Baskapelle, a West Bend-based band, is slated to play German music from 11 a.m. to noon. Copper Box, an Oshkosh-based, multi-genre quartet that plays polka, rock and blues will play ...