Dear Élie, I'm not sure how much you or others are planning on doing further development at this point, but while we're on the topic of feature requests one that would be very helpful would be to finetune the system for flats and naturals. Currently this is the part of score production that is most laborious for me, because the flats and naturals have to be readjusted manually each time depending on the width and text/chant size of the score. If we were able to have a more absolute system of flats that could appear or not appear depending on the context, that would go a long way towards making an individual GABC file much more flexible.
As far as I know, there are two different systems in 19th/20th century chant books for notating flats and naturals. 1) In the Vatican edition, a flat applies until a natural, or a division line, or a new word. 2) In Dominican chant books, a flat applies until a natural or the end of a line. I think that the best way to notate flats in GABC should be to put a flat indication on every note that ought to be flat, and then have Gregorio determine when to actually print the flats in relation to the rules of the flats. If this change was to be implemented, perhaps it could be done in a way that left that current system in place (and would thus be backwards compatible) but which added a flat or natural to a note in a way analogous to the notations that add a rhythmic mark to a note, i.e., by putting a letter *after *the pitch/height indication. As an offhand suggestion, you could use % for flat: [e.g.: A(i%)men.(j)] A specific letter-notation for natural would not be necessary because a natural would be added automatically if the flat was not present in the notation. Yours, bro. Innocent, op
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