forthcoming in Contemporary Music Review 36 (5-6) 2017. 'Mediation' is perhaps one of the most powerful terms in contemporary music studies, but also among the most accommodating. While we can sometimes discern genealogical or conceptual convergences among its various analytical articulations, at the same time one of the term's most interesting features is its persistent multiplicity. It is eminently relational, but also slippery. Simply put, it defers questions of meaning and power in a present situation to subjects, objects, times, or places which may not be present -or at least not in precisely the same way.In musicology, as well as in recent anthropologies of music and sound, the notion of mediation has served primarily as a way of drawing attention to the diverse social and material backgrounds that give a sense of agency and life to musical objects. Its applications are diverse, contested, and in no way limited to the examples I want to discuss here. This may in part be because, as Georgina Born (2005) has frequently emphasised for over two decades now, it is possible in principle to interpret all music as multiply mediated, and mediating, in relation to the various socialities and materialities that make it meaningful. Nevertheless, we still most often hear of mediation in discussions of musical assemblages where recording, transmission, or sound synthesis technologies play a central role. In the past, this tendency took on a strongly prescriptive tenor based on the idea that using such technologies constituted a break with or impediment to 'immediate', face-to-face communication (Sterne, 2003, pp. 20-22). The sense of threat may be gone, but the association with absence remains.Although few would still agree that a conversation over the telephone is somehow less of a conversation than one around a café table, there is still a lingering sense that we can learn more about mediation from the former than from the latter. But mediation in Born's sense is clearly at work in both situations. We can think of the conversation as enacting a momentary bond across a heterogeneous assemblage made up, among other things, of bodies (voices, hands, faces), objects (tables, chairs, buildings, telecommunication devices, perhaps a bit of food or drink), and identities