Hi Erik,
Am 25.12.21 um 18:59 schrieb E Appeldoorn:
I have created a complete bare minimum of a trial, one bar, two voices.
While that's much closer to a minimal example than your previous
examples, it's still far from being a bare minimum. That would be
something like:
\version "2.22"
<<
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] g8[ \appoggiatura {g32 a} b8]|
}
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] e16[ d f e]
}
>>
(I'm sorry, I do not intend to be obnoxious, but there might be people
on this list who are more willing to help if the problem is posed as
concisely as possible.)
A couple of weeks ago I had a question about a spacing problem I have
in a score. After many trials that did not solve anything I'm coming
to the conclusion that there might be a bug with the \appoggiatura and
the \acciaccatura. I did try the options you then gave me. (context
\score \override SpacingSpanner.strict-note-spacing = ##t and also
\override Score.SpacingSpanner.strict-grace-spacing = ##t) that both
make matters worse further along in the score. All problems disappear
when I delete the \appoggiatura with its notes.
One voice has the \appoggiatura at which point the other voice doesn't
justify the notes that go beneath the \appoggiatura. So if you have
any more suggestions I would welcome them. If not I will classify this
behaviour as a bug.
Well, you're certainly right that what LilyPond makes out of your score
is less than satisfactory. The underlying problem is that LilyPond is
very strict about
- aligning simultaneous events vertically,
- not aligning non-simultaneous events vertically,
- handling grace music (e.g. appoggiaturas) as occuring both before
their main note, but after anything earlier in time than their main
note. (They are handled as if they occupy their own "infinitesimal" time
scale.)
What would be the correct way to engrave this? Space the 4 16ths evenly,
put the two 8ths above their corresponding 16ths and squeezing the
appoggiatura notes in? What if there's not enough place left for them -
should the 16ths then be spaced further apart (evenly) until it fits?
Even if this leads to the 16ths on beat 4 being spaced further apart
than those on beat 3?
Basically, this is what happens with strict-grace-spacing = ##t:
\version "2.22"
\layout {
\override Score.SpacingSpanner.strict-grace-spacing = ##t
}
<<
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] g8[ \appoggiatura {g32 a} b8]|
}
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] e16[ d f e]
}
>>
Now you stated that this makes matters worse further along in the score.
Can you give an example for that behaviour?
In fact, it is kind-of possible to switch strict-grace-spacing on/off
over the course of a score; this is possible by using
\newSpacingSection. But this seems to seriously mess the overall spacing
up, and without having given the matter much thought, I'd lean towards
classifying _this_ as a bug:
\version "2.22"
strictGraceOn =
{
\override Score.SpacingSpanner.strict-note-spacing = ##t
\newSpacingSection
}
strictGraceOff = {
\revert Score.SpacingSpanner.strict-note-spacing
\newSpacingSection
}
<<
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] g8[ \appoggiatura {g32 a} b8]|
}
\new Staff \relative c'' {
g8[ b16 as] g8[ b] a16[ g b a] \strictGraceOn e16[ d f e]
\strictGraceOff
}
>>
Lukas
