During the 2014 International Summer Course for New Music in Darmstadt, Berlin-based composer Mark Andre (b. 1964, Paris) lectured specifically on how his own compositional practice is concerned with ‘interstices that occur between compositional polarities – the affect, the appearance, the families of time and sound, the families of impulse responses – before they unfold themselves fragile, shadowy, breathlessly and fade away’. Drawing upon Andre's teachings at Darmstadt, as well as certain theories on existence put forward by Michel Foucault, Jean-Luc Nancy, Gilles Deleuze and Félix Guattari, and Pierre Boulez, this article will work to prise open and unfold a broad, contextual backdrop for theorising the composer's own compositional practice. In particular, this article will argue that Andre, like the authors named above, uses the position of interstices to contest the working of ‘synthetic’ structure in (Western) civilisation, and so relieve, even if momentarily – by allowing ‘being’ to freely resonate, even speak – any notion of synthetic impingement.