The title of the piece (translatable as “Iridian essence”) is both an allusion to the visual nature of human perception, both a wordplay in spanish for the phenomenon of iridescence (“Iridescencia”).
The hi-hat is seen as a resonating chamber whose shape and dimensions can be continuously modified through different combinations between pedalwork (changing the distance between cymbals), left hand muting techniques and right-hand percussive actions. The air contained inside this resonating chamber is transfigured, yielding multiple sound colors, and through this coloring of air a fundamental contact point is established between two instruments that seemingly have very little in common.