Hi Pavel,
Am 09.08.20 um 12:30 schrieb Павел:
I want to write simple function that will be change duration of note.
But I stuck on the first step: I can't "extract" (or "see") the
duration property:
\version "2.20.0"
mynote = c'
\displayMusic \mynote
#(display-scheme-music
(ly:music-property mynote 'duration))
Try setting mynote = c'8 from the start.
LilyPond interprets your mynote as a naked pitch (and you obvioulsy
can't extract a duration from a pitch). This can be seen by doing
#(display-scheme-music mynote) which yields (ly:make-pitch 0 0), or
simply by #(display mynote) which yields #<Pitch c' >.
It seems using \displayMusic hides this fact by first upgrading #mynote
to a full-fledged NoteEvent; these implicit conversions happen all the
time in LilyPond.
Best
Lukas
