Ritmorroto for Solo Clarinet by Roberto Sierra. Subito Music, 1995, SS, 5 pages. The three pieces of Ritmorroto are studies in new rhythmic idea and the simulation of polyphony. In the first piece the rhythmic cells and melodic motives act independently of each other. The second study explores contrapuntal ideas. The last piece is really two different pieces that happen simultaneously; one starts in the low register with loud dynamics and aggressive rhythms and the other starts gently in the high register. Gradually they travel in opposite directions ending in the reverse positions from which they began. Duration about 6 minutes. (C0914)