diff music

[CJ Bell]

Is there an existing function to diff two pieces of music? (or has
anyone attempted to write such a function?)

ex:
  \diff \partA \partB

Perhaps notes that partB adds are tagged one way and notes that are
removed from partA are tagged another.

I want to color unchanged music from partA to partB as black, removed
music as red, and new music as blue to quickly highlight the changes
between versions of music.



thanks for your time,
-cj