Technique as the entanglement of composition and performance as an epistemic object (Knorr Cetina) emergent from contingent materiality. Two pieces by Scott McLaughlin—respectively for Zubin Kanga (piano) and Mira Benjamin (violin)—are discussed as case studies of strategies for entwining the specific embodied techniques of instrumental performance with the material agency (Pickering) of the instrument as a 'material indeterminacy' in which knowledge inheres through practice (Spatz).