for MIDI Instruments in 17-tone equal temperament (1989/90)
Heptadecatonic Drops is the first of several pieces in 17-tone equal temperament (17TET). Prior to the composition, I spent approximately two years exploring musical tunings from the following points of view: 1. equidistance, 2. high stability, and 3. intelligibility of the harmonic-melodic processes. I finally selected the 17-tone tuning which is marked by a closed circle of 17 almost just fifths. Upon completion of my score, I realized the computer version (using MIDI) in the following way:
To avoid the manual entry of approximately 80,000 characters I elaborated a number of algorithms that would allow me to recompose the score automatically. Afterwards I edited the data files manually.
Formally, the three movements Prolog, Etude, Epilog - although derived from the same musical material - are arranged in a thesis-antithesis-synthesis manner.
Creation/revision date: 1989/90
Premiere: Berkeley, February 2, 1992
Publisher: Thürmchen Verlag