sets subset generator ets generates unordered subsets by manipulating interval class arrays whose universal size is between 1 and 12 members. Among many other things, it is ideal for systematically generating pitch sets using set transformations (rotation, transposition, and retrograde). The output of sets is an index to members of the universal set. The input is an index to the subset. Members of the subset are determined by the Universal size, interval class size and index; and the transformation values: a rotation position, transposition, register (octave) displacement value. Since sets is not restricted to a universe size of 12, it can be used for a wide variety of tasks. In addition to the index and interval between successive values, sets outputs the entire current set and interval array each time a transformation is made. It also generates a profile of the intervalic content of the interval class.

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