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Re: PATCH: Arrowed accidentals for microtone notation
From: |
Joseph Wakeling |
Subject: |
Re: PATCH: Arrowed accidentals for microtone notation |
Date: |
Fri, 14 Aug 2009 01:27:54 +0100 |
User-agent: |
Thunderbird 2.0.0.22 (X11/20090608) |
Graham Breed wrote:
> Oh, I didn't realize Google were covering this. I've done some work
> with Lilypond and microtonality. Somebody said I should add something
> to the snippets repository, but I've been lazy, so I haven't done
> that. There are examples in this bundle:
>
> http://x31eq.com/magic/tripod-code.zip
Thanks for that! It will take time to digest (both the musical concepts
and the Lilypond implementation) but looks fascinating and beautiful.
> That can be done with a function to switch between different sets of
> accidentals. So \preferNaturals and \preferSharps, for example.
> There may be ways of combining this with \once and \tweak as well.
I'd prefer not to do that for semantic reasons. In my conception of
arrow-notated quarter-tones, C-quarter-sharp is enharmonically, but not
semantically, the same as C-sharp-quarter-flat (just as D# is
enharmonically but not semantically the same as Eb).
> If you insist on a certain spelling of quartertones, doesn't that
> become a crap shoot anyway when you combine it with transpositions?
> Like, if you have the quartertone below C, and you want it to be C
> sharp up rather than C down, and then you transpose it up a semitone,
> what would the correct spelling be? How is the user supposed to
> specify the correct spelling for both cases?
My approach for all 'standard' transpositions would be 'transpose the
underlying notes chromatically and keep the arrows the same'. So
C-flat-up (I think that's what you meant) would become C-up and C-down
would become C-sharp-down. The question is how to implement that
successfully ... :-)
Quarter-tone transposition is more tricky but it's probably best to
start with standard transposition first.
> I believe there's already a snippet for chromatic transposition.
> That's probably the place to start for some of these issues.
> Transposition certainly works for quartertones (and I've tested more
> "interesting" situations) but you will get sharp-and-a-halfs coming
> out. But then normal transpositions might give you double sharps. If
> you don't want that I don't think it's a new issue with microtonality.
OK, I will look into that and see if I can incorporate it into the
material I have already prepared. If it works I will prepare a snippet
for LSR that can perhaps in the long run be combined with Maximilian's
proposed patch here.
Incidentally, does that mean that an option for chromatic transposition
is not a standard part of Lilypond? It was a question I'd meant to ask
previously, though not in relation to the microtonal issue.
Best wishes,
-- Joe