MICROTONAL – the violin’s microtonal slides which appear in Nocturne are early examples of Cage's interest in the pitches lying outside of the twelve-tone scale.  In Two⁶, the MATERIAL for the violinist includes passages written in a scale which divides the octave into eighty-four pitches, to be played on successively ASCENDING strings. One^lO, by using nothing but natural overtones of the violin’s open strings, deviates from the equal-tempered scale.