Dear All,   HAPPY 2018 !!   With the new PCS organization in Opusmodus is possible to implement a concept of my book, called Combinatorial Voiceleading of Hexachords. From a Hexachord Set, is possible to find 10 different ways to combine the notes in the for of voice-leading sets. Each hexachord is divided in (3 + 3) way.     This expression:   (setf hexavl (mclist (chordize-list (integer-to-pitch (remove-duplica