2023 . . . sound sculpture . . . duration 4:40
EFFULGENCE (the word means “brilliant, shining radiance”) was a 1984 improvisatory composition in the style of Terry Riley’s In C, overlapping repetitive patterns I call multi-phase ostinato music. It was like the rhythmic dance of a fountain.
This sequel evokes the speckled field of sunlight reflected on the surface of a body of water. My home state, Michigan, The Great Lakes State surrounded by three of those magnificent fresh-water seas, also contains over 1,000 smaller lakes. My whole life I have gazed at and studied the way sunlight reflects off their wave-articulated surfaces, sparkling in a complex ensemble dance of periodic flashes of light.
The musical construction is all about prime numbers. The melodic-cell eighth-note theme consists of successive intervals of 1, 3, 5, 7, and 11 semitones. Rhythmic values and motivic repetition cycles are all durations equivalent to 1, 3, 5, 7, 11 or 13 eighth-notes.
Thomas Clark - composer / digital artist 