character, how ranking of chords is determined; lowest pitch,
mean pitch, or highest pitch.
...
additional arguments passed to rank or order.
decreasing
logical, sort in decreasing order.
Value
integer for rank and order, character for sort
Details
There are three options for comparing the relative pitch position of chords
provided: comparison of the lowest or root note of each chord, the highest
pitch note, or taking the mean of all notes in a chord.