As Jonty Harrison himself acknowledges, a significant body of acousmatic music exists which has, directly or indirectly, challenged aspects of the Schaefferian theory from which acousmatic music first developed (Harrison 1995). Few pieces, however, have so clearly and deliberately confronted Schaeffer’s notion of the ‘sound object’ as Harrison’s Unsound Objects. Harrison does more than merely reject Schaeffer’s definition of the sound object through the use of expanded compositional strategies. Rather, he both employs Schaeffer’s methodology and subverts it, systematically demonstrating the potential and the limitations of Schaeffer’s epoché and its product, the sound object. The result is what might be aptly termed the ‘unsound object’: a sonic entity which both demonstrates and defies Schaeffer’s ideals, and exemplifies the rich ambiguities which can arise from the compositional exploitation of referentiality and association, in addition to the intrinsic, morphological characteristics emphasised within Schaeffer’s reduced listening. Throughout his engagement with Schaefferian theory, however, Harrison never abandons the fundamental musical radicalism at the heart of Schaeffer’s project: positing ‘concrete sound material’, rather than ‘abstract concept’, as the basis for the language of electroacoustic music (Chion 1983: 37).