What is needed is for the secondary beam (the sixteenth beam) to be broken
between each quintuplet group in the first measure of the left hand.
> 7 nov. 2024 kl. 06:11 skrev Jason Yip <sripedia_getp...@slmail.me>:
>
> On 2024-11-06 10:57, Richard Gress - rgress(a)nd.edu wrote:
>> Hi everyone,
>> I'm engraving a measure of Sorabji's First Symphony for Organ. In the left
>> hand part, beams should be subdivided each dotted sixteenth note. However,
>> the current behavior is that the beams are subdivided every beat (3 eighth
>> notes in 9/8 time.) Here's my example. I will trim it down, but it will
>> still be a lot, since I'm not sure what could possibly be interfering. I
>> have tried many different settings for the variables, and time signatures.
>> ...
>> \version "2.24.4"
>> #(set-default-paper-size "letterlandscape")
>> upperOne = \relative c' {
>> \clef treble
>> %%%%% Time sig for first measure
>> \time 9/8
>> \accidentalStyle forget
>> << {
>> \oneVoice ees8.[( fis a~] \tuplet 5/3 { a[ aes8] } a!8.[ c] \bar "!" \break
>> %%%%% Time sig for second measure
>> \compoundMeter #'((3 8) (3 8) (3 8) (3 16) (3 8) (3 8))
>> e,[ g] bes8[ a gis] \tuplet 5/3 { g!8.[ fis8] } e8. \voiceOne \tuplet 5/3
>> { d[ e8 ] } gis4.~gis16.[ a f8.])
>> } \\ {
>> s1 s8 s2. s16. s s s \voiceTwo \once \override TupletBracket.positions =
>> #'(-8 . -9.5) \tuplet 5/3 { r16 bes,[( a8 g16] } cis8[ b a] gis4.)
>> } >>
>> }
>> upperTwo = \relative c {
>> \clef bass
>> \accidentalStyle forget
>> << { \oneVoice
>> \set subdivideBeams = ##t
>> %%%%% Here is where the problem occurs. We're in 9/8 time.
>> \set baseMoment = #(ly:make-moment 3/32)
>> \set beatStructure = 2,2,2,2 %%%%% Whatever I set this to does nothing.
>> Same behavior if omitted.
>> \tuplet 5/3 { r16 cis([ d f e }
>> \tuplet 5/3 { g f g aes bes }
>> \tuplet 5/3 { b! g c d ees \clef treble }
>> \tuplet 5/3 { f e! f g8 }
>> \tuplet 5/3 { a!16 b c d ees }
>> \tuplet 5/3 { d f e! d cis }
>> \tuplet 5/3 { c! ees d c b }
>> \tuplet 5/3 { bes des c bes aes] }
>> \set baseMoment = #(ly:make-moment 1/8)
>> \tuplet 3/2 { g[ b a } \tuplet 3/2 { f e d } cis8]
>> \tuplet 5/3 { \clef bass c16[ b bes a g] }
>> \set subdivideBeams = ##f
>> f32[ e d c b bes]
>> \tuplet 5/3 { a16[ f e' g f,] }
>> \set subdivideBeams = ##t
>> \set baseMoment = #(ly:make-moment 3/16)
>> \tuplet 4/3 { e[ d c' e }
>> \tuplet 4/3 { c, aes' c fis,]~ } \voiceTwo
>> \tuplet 4/3 { fis[ c' ees a }
>> \tuplet 4/3 { g b \clef treble g' b]) }
>> } \\ {
>> s1 s8 s8. s s4. s8. s s s4. \accidentalStyle default \voiceOne fis,,8.[
>> \accidentalStyle forget g']
>> } >>
>> }
>> \score {
>> \new PianoStaff \with { \omit TimeSignature }
>> <<
>> \new Staff = "upper1" \upperOne
>> \new Staff = "upper2" \upperTwo
>> >>
>> }
>> ...
>> How do I get the beams in the first measure to be subdivided twice as often?
>> The other beams look OK.
>
> Did you try running the latest development version of Lilypond? I have
> attached the output of your score under version 2.25.21. You can even comment
> out setting baseMoment and beatStructure--they do not seem to affect the
> output. Is this what you are looking for?
>
> Note that I authored the new beam subdivision algorithm present in the 2.25.8
> version (but not in the 2.24 version series). It seems that your use case is
> most likely not possible under the old algorithm. Let me know if you need
> more help tuning the beam subdivision.
> <20241106_21h05m04s_grim.png>
