This dissertation considers the music and technical practice of composers affiliated with French spectralism, including Hugues Dufourt, Gérard Grisey, Tristan Murail, Jean-Claude Risset, and Kaija Saariaho. They regularly described their work, which was attuned to the transformative experiences that technologies of electronic sound production and reproduction could inspire in listeners, using metaphoric appeals to construction: to designing new sounds or exploring new illusory aural phenomena. To navigate a nascent but fast-expanding world of electronic and computer music, the spectralists appealed to physical musical attributes including gesture, space, and source-cause identification. Fascinated by gradual timbral transformations, they st...