 The indications of expression and dynamics are not the result of formal and structural considerations, have in fact been defined by Ligeti after different practical attempts, asking Garth Knox repeatedly try to play with different directions.In the fourth movement, Ligeti employs combinations of accents, short joints, open strings, double stops and harmonics, that with the high speed required create a particular sound.In the subsequent occurrences of the thematic material, the composer makes changes through addition or subtraction of notes, transforming individual notes in chords and vice versa, and consequently adapting accentuation and dynamics.