The word AION is derived from the koine Greek word ( αίών ) which at one point meant “a period of time”, in Greek myth AION was the god of the ages (time) also known as Chronos. The subjective perception of time is one of the main elements of which are alluded to in this work. The piece deals with three time aspects: continuity, interruption and suspension. Aion constantly explores the sensation of vacuum that arises when the music “freezes” and “thaws” as an excuse to continue to the next musical idea. The core of the piece (the opening) consists in a dense mass with similar rhythm patterns for all the instruments which are “captive” in a rather active internal structure within short periods of time. The constitution of the piece is formed by the used of restricted range of materials, phrasing and proportions. These elements are derived from speech analysis in different native languages from the south of Mexico. The objective of the instrumentation is the prolongation of these gestures through the transposition of complex counterpoints and the richness of the ensemble timbre and energy. It’s a piece over the frailty of one instant, one moment, one musical AION.