The proposed action titled “ECoSync” aims to incorporate computational modelling as a pivotal framework for elucidating the intricate dynamics of social bonding. This new framework is crucial for the European Work Programme in the current global crises. The action perfectly aligns with the Programme's vision of addressing pressing societal challenges for the well-being and stability of European communities. Recognizing the profound impact of emotions on human well-being, this research endeavors to uncover the underlying mechanisms that govern the emergence of social bonding. The action includes training in computational modelling and fundamental research in musical performance. It highlights interpersonal synchronization as a method for cultivating strong interpersonal connections. Understanding the interplay between emotions and interpersonal synchronization in musical interaction opens up new avenues for exploration, supporting resilience and recovery in the context of global adversity through social bonding. To quantify the processes underlying the formation of social bonds, we will execute a sequence of three work packages (i.e., WP2-WP4). These work packages will synergistically integrate cutting-edge methodologies from nonlinear dynamical systems, social and affective neurosciences, and music psychology. WP2 will focus on the computational mapping of emotional effects on interpersonal coupling. In WP3, we will validate and refine the model through empirical dyadic musical interaction, leveraging advanced motion capture and physiological techniques. In WP4, we will investigate how emotions influence group synchronization and its subsequent impact on social bonding. Finally, the action’s international mobility and training in research will broaden the applicant's academic portfolio and develop extensive experience as well as professional connections, furthering the advancement of the applicant's career as an independent researcher.