Hello,
Am 29.05.2015 um 11:42 schrieb Haipeng Hu:
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,
It’s so impressive that you are able to do this – write lilypond code,
read scm files etc. – without eyesight. Kudos!
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.
No attachment there…
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 believe that Lily’s current behaviour is carefully designed and will
comply with the relevant literature. If in 6/4 time 16th notes would be
beamed by half bars, the very long groups of 12 notes would be very
difficult to read, except if you use subdivision:
%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.19.20"
\score {
{
\set subdivideBeams = ##t
\time 6/4
\set Timing.beamExceptions = #'()
\repeat unfold 24 c'16
}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%
See also
<http://lilypond.org/doc/v2.18/Documentation/notation/beams#setting-automatic-beam-behavior>
for more information on using baseMoment, beatStructure, and beamExceptions.
HTH, Simon
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