While interest in art-based interventions is growing rapidly, little is known about the aesthetic, material, and interpersonal mechanisms by which art interventions, and musical interventions in particular, operate. We address this gap by drawing from an in-depth case study of a musical intervention in a professional ice-hockey team in Finland. At the time of the study, the organization faced a serious crisis, having lost 11 sequential games, leading its managers to search for "alternative" means for promoting social cohesion, and subsequently engaging in an arts-based musical intervention. Our findings examine how material objects and collective synchronization rhythms grounded the interpersonal interactions of team members and mediated members' attempts to transform personal subjective experiences into collective collaboration. We draw out the conceptual implications of our findings for understanding, on the one hand, the collective nature of aesthetic processes, and on the other hand, the materially mediated processes of communication. In terms of practical implication, we contribute to understanding the social dynamics and transformative organizational possibilities of artistic interventions that generate value for the organization and its members.