illusion insoluble # voice and tape # 9:00'
live-recording at the premiere may 2004, KGNM Musikfest, Alte Feuerwache, Cologne, Germany
raumfahrten II-IV # two voices and tape # 10:00'
premiered september 2006, concert "stimmhaft-stimmlos" hommage to Alfred Wolfsohn & Roy Hart, second voice: Ian Magilton (Roy Hart Theater Norway)
Ae & U # voice and 4-channel tape # 10:00'
premiered july 2005 as part of singthings, BrückenMusik XI, Deutzer Brücke, Cologne, Germany
rocket science rag # voice and electronics # 8:45'
duo &2: hans w. koch electronics, Bettina Wenzel voice
live-recording april 2007, ROD, CalArts, California, USA