For Alto Flute and Live-Computer
Siegfried Koepf 2007 – 2008
The composition is based on the analysis of Thomas Frey's Alto Flute. The analysis relates to the logical relationships between the keywork and the tone holes (or rather the corresponding pipe lengths) of the instrument. The set of all combinatorial possibilities forms the basic material of the composition, which is sifted and arranged by different filter and sorting algorithms and notated as a sequence of fingerings, each combined with collaboratively developed playing instructions. This sequence of events is completed by the performer and recorded by the live-computer. Then, the signal is played back by the computer in a real time process, producing a canon in seven voices.
From the program booklet of music from code, 2008.03.09, Friedrichshafen, Kiesel im k42