Luciano Berio wrote, between 1958 and 1996, thirteen pieces for different solo instruments, each one of them entitled Sequenza, in which one of the purposes was to create, particularly in the monodic instruments, a polyphonic mode of listening by the suggestion of implicit counterpoint. The purpose of this paper is to examine the differences between the 1958 original edition and the 1992 edition of Sequenza I, for solo flute, especially with respect to rhythmic aspects, tempo, and proportionality, and their implication on performance.