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Re: Issue 694 in lilypond: Enhancement: arrowed heads for microtone acci
From: |
lilypond |
Subject: |
Re: Issue 694 in lilypond: Enhancement: arrowed heads for microtone accidentals |
Date: |
Sun, 19 Sep 2010 17:48:40 +0000 |
Comment #8 on issue 694 by joseph.wakeling: Enhancement: arrowed heads for
microtone accidentals
http://code.google.com/p/lilypond/issues/detail?id=694
Can you clarify which points you feel are not clear?
My feeling is that it is principally a code issue, not a doc one. Lilypond
simply does not support effectively one of the ways of writing microtones
-- which is to successively "shade" pitches by adding extra symbols to the
accidentals (up/down arrows, +/-, whatever).
The _reason_ it does not support this notation for microtones is because of
Lilypond's internal way of representing pitch -- as staff position +
alteration.
That clashes with a notation like e.g. the arrow notation for
quarter-tones, where the same alteration (+1/4) can be notated with two
different accidentals: natural-with-arrow-up or sharp-with-arrow-down.
I developed a 'cheat' solution that used subtly different alterations to
correspond to these different accidentals, but it's far from ideal. A
better approach would likely be to have a notation like
\qUp c \qDown cs
... which modifies the accidental contextually.
Anyway, bottom line is, this needs code solution first and then
documentation one.