The Langertsons is a young, Mahtowa-based rock band that started producing solid, straight-from-the-heart, original music before its members were old enough to drive. The group combines two sets of siblings, Josie and Audrey Langhorst and Amri and Eli Gilbertson, to form a group bursting with blood harmonies, lyrical piano work and soul-searching songs written mostly by Josie Langhorst. The Langertsons have put together three records with Rich Mattson at Sparta Sound. The latest, Peppery Cat, is an EP released in June that continues to advance the group’s sound into more creative and ear-popping places.