[Lilypond-auto] Issue 2888 in lilypond: [musicxml2ly] beams and lost lyric syllables

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Defect

New issue 2888 by address@hidden: [musicxml2ly] beams and lost lyric  
syllables
http://code.google.com/p/lilypond/issues/detail?id=2888

Reported by pls:
http://lists.gnu.org/archive/html/bug-lilypond/2012-10/msg00060.html

Hey all,

syllables under beamed notes are swallowed by musicxml2ly (LilyPond  
v2.17.3).
This seems to be a close relative of Issue 2881.

Test File:
https://github.com/Philomelos/lilypond-musicxml2ly-dev/blob/master/MusicXML-TestSuite/beams-lyrics.xml

Result of the conversion of the test file (see also:
https://github.com/Philomelos/lilypond-musicxml2ly-dev/blob/master/MusicXML-TestSuite/beams-lyrics.ly):

\layout {
    \context { \Score
        autoBeaming = ##f
        }
    }
PartPOneVoiceOne =  {
    \clef "treble" \key c \major \time 4/4 c'8. [ c'16 ] c'2. }

PartPOneVoiceOneLyricsOne =  \lyricmode { Syl -- ble }

The middle syllable of Syl -- la -- ble is missing. It got lost during the
musicxml2ly conversion. But even if the syllable hadn't been swallowed  
LilyPond
seems to have a problem with manual beams and lyrics in combination with
autoBeaming = ##f. Compiling the file with

PartPOneVoiceOneLyricsOne =  \lyricmode { Syl -- la -- ble }

leads to this result:
https://github.com/Philomelos/lilypond-musicxml2ly-dev/blob/master/MusicXML-TestSuite/beams-lyrics-autoBeaming%3Df.png

When one exchanges the autoBeaming = ##f for \autoBeamOff in the  
\layout-block
the problem with the wrong alignment of lyrics is solved.  Is autoBeaming =  
##f
deprecated?  This would be easy to adjust in musicxml2ly.  The lost  
syllables
pose a bigger problem...

http://lists.gnu.org/archive/html/bug-lilypond/2012-10/msg00062.html
I forgot to mention that syllables don't get lost when musicxml2ly is used  
with
the option --no-beaming.  But this is only a dirty workaround as LilyPonds'
autobeaming algorithm overrides the beaming information provided by the
.xml-file.  Beyond that we implemented a new musicxml2ly feature to  
translate
the stem directions
(https://github.com/Philomelos/lilypond-musicxml2ly-dev/commit/0747e5ce34f8d3a6128302ec0363a8f5f91ce3fd).
  This leads to ugly effects in combination with --no-beaming as LilyPond  
tries
to connect notes with stems pointing in different directions...