His last work at IRCAM, "The Angel of Death" (1998–2001), for solo piano, chamber orchestra, and 6-channel computer processed sound, was written with a substantial number of perceptual psychologists both assisting and analyzing the end results. His assistant on the project was Frédérique Voisin, and the principal psychologists were Steven McAdams (IRCAM) and Emannuel Bigand (University of Bourgone). The end results included a special issue of the journal "Music Perception", edited by Daniel Levitin, an audio CD / CDROM publication by IRCAM, along with a day-long conference in Sydney, Australia.