The Signal app is an internet radio sweeping app made for Instrumental TransCommunication (ITC). The idea is modeled after a traditional ghost box that sweeps through AM/FM radio stations and picks up random bits of audio that spirits can use to form speech. Unlike terrestrial radio bands that are filled with a lot of static and harsh sounds this app uses internet radio stations that are static free. This provides a cleaner sounding sweep that has only the speech sounds needed for spirits to communicate.
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