On 03/12/15 12:11, N. Andrew Walsh wrote:
If your system requires only a range in cents to determine which accidental
to use, that should be easy to calculate and apply. If it requires only the
prime factors of the ratios, that should be easy, too. If it's some mixture
of them, that works as well. And for all of them, it should be possible to
output something different to different instrumental parts, as needed.
Prime factorization to control the accidentals wasn't easy when I looked
at it. The only information available when the accidental was chosen is
the pitch-difference, so that's what I used. There are ways
communicating, though, like choosing different accidental sets according
to the factors or building the accidental string recursively. Maybe
it's easier with new versions of Lilypond and improved documentation. I
did this a while ago and learned the internals as I went along. I
welcome assistance from more experienced Lilypond-Schemers, and if it's
going to be re-implemented from scratch, at least my code's there as an
example of what can work.
Graham
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