Time-Point Sets and Meter
William Marvin Johnson · Perspectives of New Music · 1984
THE POSSIBILITY OF PERCEIVING any twelve-integer set as a succession of pitch classes or a succession of time-point classes and the possibility of applying the same systematic operations in the rhythmic domain as have been. applied previously in the pitch domain has been presented and explained by Milton Babbitt.' He has stated the following regarding the establishment of equivalence classes among time-points: