11 O'Clock p.m. by Ricardo Gallo is heavily influenced by his exploration of Columbian folk music. The sound of the Gaita, a Columbian vertical flute with five holes, is apparent in the melodically influenced rhythm, the limited pitch material, and driving but ever changing rhythmic configurations. However, the rhythmic material is more closely related to the 3/4 - 6/8 Bambuco polyrhythm often found in Columbian marimba music. Rhythmic material alternates in turn with sections of long sustained 7th and 9th chords. Three themes are introduced immediately and then are synthesized over the course of this piece. Gallo is one of a number of Columbian composers and performers who are integrating Columbian folk music into their language both in the classical and jazz worlds in a trend similar to the intense interest in the early 20th century by Bartok, Kodaly, and Janacek in the folk music of Eastern Europe. 11 O'Clock p.m. stands alone as a work for solo violin but will also be utilized as a part of a live-electronics work that will utilize samples from the violin score.