Phil Holmes wrote:
"Hilary Snaden" <h...@newearth.demon.co.uk> wrote in message news:4de210b3.80...@newearth.demon.co.uk...Manual beamings of cross-staff note groups are mangled, but inconsistently. The beaming in this extract works for the first 6 bars, then fails on beats 1 and 3 on the following bars. (Beamings on beats 2 and 4 are as they were.) Versions 2.12.2, 2.13.61 and 2.13.62 behave in the same way.Could you prepare a tiny example that demonstrates this, please? (See http://lilypond.org/website/bug-reports.html)
The original example showed that the beam-mangling didn't start (in the real-world case) for several bars and that the mangling occurred only on the 1st and 3rd beats of the original 4/4. (Bugs within bugs?)
Another oddity: if the ais16 on the second 4 is replaced with a rest, the semiquaver group *before* it renders correctly.
I'm also curious to know whether this occurs with "normal" manual beaming - i.e. [ ]
It does. (That was one of the first things I tried!)
\version "2.13.62"
csu = \change Staff = "upper"
csl = \change Staff = "lower"
manualBeam =
#(define-music-function (parser location beg-end)
(pair?)
#{
\once \override Beam #'positions = #$beg-end
#})
\pointAndClickOff
\score {
\new PianoStaff {
<<
\new Staff = "upper" \relative ais {
\clef treble \key a \major \time 2/4
\stemUp
r16 \csl \manualBeam #'(1 . 1.5) ais^( g \csu e'
\csl \manualBeam #'(1.5 . 2) ais, \csu g'=' e g)
}
\new Staff = "lower" \relative cis {
\clef bass \key a \major \time 2/4
\stemDown cis4 r
}
>>
}
}
Log warnings:
21:41: warning: weird stem size, check for narrow beams
r16 \csl \manualBeam #'(1 . 1.5)
ais^( g \csu e'
21:47: warning: weird stem size, check for narrow beams
r16 \csl \manualBeam #'(1 . 1.5) ais^(
g \csu e'
21:54: warning: weird stem size, check for narrow beams
r16 \csl \manualBeam #'(1 . 1.5) ais^( g \csu
e'
--
Hilary Snaden
beambug3.pdf
Description: Adobe PDF document
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