For 2 mallet percussion (mrm+vb & vb+xyl).
The harmony in this piece is algorithmic: the set of pitches governing the content of a unit of time is subject to discrete transformations in cycle-5 space by a repeating, irregular pattern; then, in a second processual layer which evolves over the course of the piece, the pitches tend to clump together according to the magnitudes of contiguous subsets of pitches-I analogize this process as being "gravitational." Over the course of the piece the attractive tendency eventually causes the appearance of complete diatonic collections, (ie 7 contiguous pitches in cycle-5 space) around m. 60 (04:10). The following higher-level transformations in turn seed the irregular pattern of the "universal gravitational field" of the first processual layer.
Formally, and through the setup of the instruments, I intended to explore different kinds of communication challenges (who leads and who follows, unison playing vs. rhythmic polyphony). The resulting form is pretty simplistic, though, not to mention in no way complete, so there's certainly more work for me on this topic.
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