Harmonious Wail & their music defy simple categorization, but you're sure to find some Gypsy Jazz in their sets. Maggie Delaney-Potthoff is the voice most often at the front, and the vocal spotlight is well-deserved. Maggie's Method is the unusual technique used in the voice lessons she gives, and Harmonious Wail leads up the Midwest Gypsy Swing Fest twice a year, in Madison, WI.