A business model of satellite digital audio broadcasting, also referred to as multicasting, teaches computer improvements in business operations for the determination of the number of listeners and listeners' preferences of multicast satellite transmissions and more particularly to the detection of signals from a multitude of individual client radios that simultaneously respond to a polling signal with a radio frequency chirp. A response to a polling signal instruction is synchronized utilizing an instruction embedded within a digital audio broadcast. Further embodiments teach a determination of listener count derived from signal strength, single chirp signal strength contribution derived from reception delay, and media prioritization derived from changes in user preferences.