Nelson Zagalo is full professor of Multimedia at the University of Aveiro, and Scientific Coordinator of DigiMedia - Digital Media and Interaction Research Center. He founded the Portuguese Society for Videogames Sciences, and the Journal of Digital Media & Interaction. He is the author of more than two hundred peer-reviewed publications in journals, books and conferences worldwide. He has written the books ""Interactive Emotions” (2009), “Videogames in Portugal” (2013), and ""Engagement Design. Designing for Interaction Motivations"" (2020). Damián Keller is a full professor of music technology at the Federal University of Acre and the Federal University of Paraíba in Brazil. He is a founding member of the international research network Ubiquitous Music Group and of the Amazon Center for Music Research (NAP). He has published over two hundred articles on ubiquitous music and ecologically grounded creative practice in journals on computing, engineering, design, education, philosophy and the arts. His latest coedited book is Ubiquitous Music Ecologies (Routledge).