Re: 27-- some clues on Page xvi and Page xxii of the introductory notes in the site. I sort of understand what they are saying in these notes, but I'm too tired now to give you an example-- maybe Mmario can give a parallel structure for a shanty.
I can try to be more helpful tomorrow; as to how to set it up as a MIDI I would say just input it as it appears in the page image. I can rework it once we have a better idea how it fits together, and that will come as I sing each of these through.
Good question! Verrrry interesting!
Gosh, what care you are all takig with these-- what faithful stewards of this amazing legacy.