Grappling with music in language (music-ology) offers a critical reflection on both. It is here that a hundred years of the philosophical critique of language (from Mauthner, Wittgenstein, and Bergson through to Serres, Nancy, Derrida, and Wellmer) overlaps with a tradition of music after Debussy that, through a logic of the senses, resists the grammars of language. A key source here is Lyotard’s Discours/Figure. A recent convergence of work on the relation between music and language, across diverse scientific disciplines, suggests productive links with the kinds of ideas that emerge from the study of music ‘after Debussy’. The chapter concludes by considering how, at its boundaries, the range of practices we might call musical (playing, listening, composing) blur into something more broadly ecological and ethical.