Hi, I've been studying counterpoint more in depth, from its origins and in several complex forms. This is. little piece exploring triple invertible counterpoint There are three melodies or subjects in counterpoint, which can be inverted in every possible way (a total of six). The cell is formed by 5 measures. Part A repeats the cell three times in Cm, different inversions of the lines. Part B is a sequence. Part C repeats the cell in other different three ways in Fm.