( for Adah and RubyLou ) Close-up of the Rivergraph Score Instructions any number of players with instruments, voices, and sound The organic line is a path of performance based on a map of Cane Creek as it passes by Chapel Hill, North Carolina. Vertical lines are demarcations of time you agree upon beforehand. They do not need to be equal or precise. Sources An instrument that can express any or all of the pitches: E, F, G, A-flat An object that makes unpitched sounds, like percussion or electronic noises.