Transit world premieres 2006, recording of "Ventriloquium", performed by Champ d´Action & collectief reFLEXible and compositions by Nicolaus Huber ("Silver Silence" by Trio Fibonacci), Frank Nuyts ("The Trances" by Schlagquartett Köln), Denis Bosse ("Alarme" by Trio Fibonacci), James Harley ("Troi" by Trio Fibonacci). Not commercially available.
Integrating the Recorder, CD-A 006, with "Memory Space #2", performed by Champ d’action and Tomma Wessel and compositions for recorder and ensemble by Michael Finnissy, David Nunezanez, Jeff Nichols, Matthew Shlomowitz.
Recording of "Etude Intérieure #1" for piano and marbles (Stefan Prins, piano & marbles), and "Risonanza" (Peter Swinnen) for piano 4-hands, together with Yutaka Oya (piano). Released 4 December 2004.
Realgar by collectief reFLEXible (Joachim Devillé, trumpet & flugelhorn; Thomas Olbrechts, alto saxophone; Stefan Prins, live-electronics (Amirani Records, released 20 October 2008)
[without title], duo with Horacio Curti (Ipso Facto Records, Barcelona, February-June 2002)
One to free for, trio with Thomas Olbrechts (altsax) and Joachim Devillé (trompet) (Disque Flexible, België, April 2002)
Three improvisations for piano solo (Ipso Facto Records, Barcelona, February 2002)
ShadowS, duo with Horacio Curti (shakuhachi) (Ipso Facto Records, Barcelona, December 2001)
Recording of Larry Polansky's "Ensembles of Note" & "The World's Longest Melody" (ZWERM electric guitar-quartet, [sic] & Stefan Prins, live-electronics). Released August 2010.
Recording of Richard Barrett's "Codex VII" for ensemble & live-electronics (Champ d'Action - Stefan Prins, inside piano). Released 2009.
The Blue Cloak (Mark Applebaum), Champ d’Action (Stefan Prins - inside piano), Innova Records.
More or less, CD-A 005 (Champ d’Action CD), with 2 versions of More or less (Karlheinz Essl), with Stefan Prins (piano and objects), Thomas Olbrechts (altsax), Joachim Devillé (trumpet, flugelhorn), Karlheinz Essl (laptop), Fedor Teunisse & Marcel Andriessen (percussion), Jaan Bossier (bass-clarinet), Serge Verstockt & Peter Swinnen (electronics). Released 15 March 2005.