 In 1922, Puerto Rican radio station WKAQ inaugurated its radio transmission in the island with a program called "Industrias Nativas" (Native Industries), and Martinez and his trio were participants.It was the first time in Puerto Rican history that the radio listening public was to hear a cuatro via the airwaves.Martinez met many established musicians of the time, among them Felipe ("Don Felo") Rosario Goyco and Ernestico Leocadio Vizcarrondo.