Copyright © 2019, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 8 171 DOI: 10.4018/978-1-5225-5696-1.ch008 ABSTRACT This study sees the technology and communication interface in the radio universe. In the last 20 years, radio became multimedia with the use of digital codes, which uses transmedia storytelling to spread the contents in diferent media and platforms. The objective of this chapter is to observe the changes in relation to the production of content in the multimedia radio, the reception and interaction processes of the receivers in this new context, and the language changes that occurred during the process. As a methodology, it presents a review of the current radio theory and an observation of the phenomena resulting from the production of multiplatform content in radio stations operating in AM and FM. INTRODUCTION Radio broadcasts have undergone several transformations since the beginning of their commercial use in 1920. Among these transformations is a scenario of hegemony of broadcasters in AM, which between the 1920s and 1950s were the main source of real-time information for society; the change of content by the emergence of television and the beginning of consumption in mobility, made possible by the development of transistor receivers; and the emergence of FM radio, which came to be used for music broadcasts, while the AM radio was dedicated to the spoken word. The current The AM and FM Radio Changes in the Multimedia Radio Emergence Johan Cavalcanti van Haandel FIAM FAAM Centro Universitário, Brazil