Avide, Aride, Acide: three words, three characters, with only one change of letter. Avide is an image of a molecule moving in the human body, an incessant quintuplet movement, which takes sudden musical changes. Aride is the desert, a desert of notes (six notes). A work on the timbre and expressiveness of the instrument. Acid is the bitterness of taste. The high-pitch register of the clarinet can disturb the perception of the ear.