Here's more explanation of the dodecaPitchNames snippet:
http://lsr.dsi.unimi.it/LSR/Item?id=619
This part:
#(ly:parser-set-note-names parser dodecaPitchNames)
Calls dodecaPitchNames, which as I understand it, basically takes something
like this as its input (the default pitchnames list):
(ces . ,(ly:make-pitch -1 0 FLAT))
(c . ,(ly:make-pitch -1 0 NATURAL))
(cis . ,(ly:make-pitch -1 0 SHARP))
(des . ,(ly:make-pitch -1 1 FLAT))
(d . ,(ly:make-pitch -1 1 NATURAL))
(dis . ,(ly:make-pitch -1 1 NATURAL))
(ees . ,(ly:make-pitch -1 2 FLAT))
(e . ,(ly:make-pitch -1 2 NATURAL))
And turns it into this:
(ces . ,(ly:make-pitch -1 -1 NATURAL))
(c . ,(ly:make-pitch -1 0 NATURAL))
(cis . ,(ly:make-pitch -1 1 NATURAL))
(des . ,(ly:make-pitch -1 1 NATURAL))
(d . ,(ly:make-pitch -1 2 NATURAL))
(dis . ,(ly:make-pitch -1 3 NATURAL))
(ees . ,(ly:make-pitch -1 3 NATURAL))
(e . ,(ly:make-pitch -1 4 NATURAL))
Notice the difference in the "scale degree" numbers just before NATURAL and
the clearing of the alterations FLAT and SHARP. Again this is moving from a
diatonic scale to a chromatic scale mapping.
-Paul
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