CITR’s 24 Hours of Radio Art in a snack sized format. Dark Ambient. Drone. Field Recordings. Noise. Sound Art. Or something. This Friday afternoon’s broadcast features new Fabio Orsi, Simon Serc, Petrograd Drone Gathering, Bu.d.d.A, plus a fascinating interview with Belgian mathematician / electronic musician Dr. Valery Vermeulen by Crespan collaborator Mark Hjorthoy.