My tape composition Hommage a S... pour S... was my first work based on an existing piece of music, in this case, the Sonata K 259 by Domenico Scarlatti, played by my student Sarah Köster. Improvisation PCV continues in this genre. The tape composition is based on live recordings of my collaborative improvisational project with Roland Graeter: Improvisations for Piano, Cello and Voice. We've been working together on purely improvised performance since 1995. The method for creating something new out of something already existing could generally be described as "deconstruction": destroying the piece by cutting it into bits, then processing these bits with sound designing software (using filtering, ring modulation, pitch-and-time transposition, multi delay etc) and finally building up new textures from the processed material and the final form of the piece from these textures.