 "büro 44", Purple Institute, Paris; "Número Festival", Lisbon; International Triennale of Contemporary Art, Yokohama, Japan; "Nesh", Electrowerkz, London; "LoveBytes", Sheffield all in 2001. büro 30, Spiral Hall / CAY, Tokyo; Sónar, MACBA, Barcelona; "Synthèse 2000", IMEB, Bourges; "Avanto", Kiasma, Museum of Contemporary Art, Helsinki; "Wien Modern", Konzerthaus, Vienna in 2000.Since 2005 Hecker presented a series of UPIC Diffusion Sessions in collaboration with Russell Haswell, as “Haswell & Hecker”, performing recordings made exclusively with Iannis Xenakis graphic input computer music system.Amongst many other locations, at "Serralves em Festa", Fundação Serralves, Porto, 2009; Conway Hall, London; "Patronage of Space", Lopud; Donaufestival, Krems; Kunsthalle, Zürich all in 2007 and Cubitt at City University, London, 2005.