Haipeng
Lily isn't wrong as there is no indication on grouping. 5/4 and 6/4 can be grouped many ways is 5/4 2+3 3+2 1+4 etc. The same as 6/4 3+3 2+2+2 2+4 etc. Anyway I think sibelius just chose a default and you happened to want that. Or, your some how indicated to it that is what you wanted. Anyway, to group it like that
\score {
\new Staff \relative c'' {
\clef treble \time 2/4
b16 b b b b b b b |
\time 3/4
b b b b b b b b b b b b |
\time 4/4
b b b b b b b b b b b b b b b b |
\time 5/4
% disable beamExceptions
\set Timing.beamExceptions = #'()
%%%
% beat
\set beatStructure = #'(3 2)
\repeat unfold 20 b
\time 6/4
\set Timing.beamExceptions = #'()
\set baseMoment = #(ly:make-moment 1/4)
\set beatStructure = #'(3)
\repeat unfold 24 b
}
}
However the following is more clear IMHO
\score {
\new Staff \relative c'' {
\clef treble \time 2/4
b16 b b b b b b b |
\time 3/4
b b b b b b b b b b b b |
\time 4/4
b b b b b b b b b b b b b b b b |
\time 5/4
% disable beamExceptions
\set Timing.beamExceptions = #'()
%%%
\set subdivideBeams = ##t
\set beatStructure = #'(3 2)
\repeat unfold 20 b
\time 6/4
\set Timing.beamExceptions = #'()
\set subdivideBeams = ##t
\set baseMoment = #(ly:make-moment 1/4)
\set beatStructure = #'(3)
\repeat unfold 24 b
}
}
Stephen
>
> Hello,
> I'm now composing an orchestral work, in which there are plenty of
> meter changes such as 5/4 and 6/4. Since I'm blind, I gave part of it
> to a teacher, and he told me that the beaming in 5/4 and 6/4 is
> incorrect. He told me the beaming must be clear for performance, so
> 5/4 must be 3/4+2/4, and 6/4 3+3. So, please look at the two pictures
> in zipped attachment. The one was directly from Lilypond, and the
> other from Sibelius, in which I imported the midi file. The beaming in
> Sibelius is correct, while in Lilypond, all 16th notes are grouped as
> 4th. I checked the time-signature-setting.scm, and found the setting
> for 6/4 is wrong. Although the comment says for 32nd notes, the line
> below it still groups 16ths as 4ths. Is this a mistake? Could anyone
> check the theory book for beaming rules and correct the scm file? I
> myself modified it and added 5/4, but don't know whether the problem
> has been solved.
> Thank you in advance!
>
> Regards
> Haipeng