Re: Clashing noteheads after switching a voice between staffs (v2.4.3)

[Mats Bengtsson]

I first tried the following

ToUpper = { \change Staff=upper \voiceFour }
ToLower = { \change Staff=lower \voiceOne }

which moves the notes of the tenor voice to the side to
avoid collisions. However, I think the following works even
better since it moves the notes to the right instead of to the left.

ToUpper = { \change Staff=upper \voiceTwo \override NoteColumn 
#'horizontal-shift = #-1 }
ToLower = { \change Staff=lower \voiceOne \revert NoteColumn 
#'horizontal-shift }

Also, I think this is better than your workaround since it
should be clear that it's a third voice that has entered the
upper stave, not just that the alto part has a divisi.

   /Mats


address@hidden wrote:
> In four part music, if a voice is crossed between staffs then the 
> collision handling for note column and noteheads tends to let go.
>
> The attached example demonstrates what happens in version 2.4.3 (running 
> on win32 under cygwin).
>
> It is possible to workaround the problem by putting a skip in the tenor 
> voice, and adding the extra notes as a chord in the alto voice, but this 
> is undesirable for all sorts of reason: not only is the staff follower 
> line lost, the notes are still really in the tenor voice!  But for 
> engraving purposes, the desired behaviour for spacing would be such a 
> combination with the alto voice.
>
> Any ideas?
>
>
> Dunstan Vavasour
> address@hidden
>
>
>
> -------------------
> \version "2.4.3"
> ToUpper = { \change Staff=upper \stemDown }
> ToLower = { \change Staff=lower \stemUp }
> global = { \time 3/4 \key g \major }
> Soprano = \relative c'{ g'4 fis e | d2 b'4 | a( b) a | g2.}
> Alto = \relative c'{ e4 d c | d2 g4 | g2 fis4 | g2.}
> Tenor = \relative c'{ g4 g c | b( c) \ToUpper d | e2  \ToLower c4 | b2.}
> Bass = \relative c { c4 c e | g2 b,4 | c2 d4 | g2. }
>
> \score {
> \context GrandStaff <<
>   \set GrandStaff.followVoice=##t
>   \context Staff = upper <<
>     \set Staff.midiInstrument = "church organ"
>     \context Voice = sopranos { \voiceOne << \global \Soprano >> }
>     \context Voice = altos { \voiceTwo << \global \Alto >> }
>   >>
>
>   \context Staff = lower <<
>     \clef bass
>     \set Staff.midiInstrument = "church organ"
>     \context Voice = tenors { \voiceOne << \global \Tenor >> }
>     \context Voice = basses { \voiceTwo << \global \Bass >> }
>   >>
>
>
> \layout {
> %%%%raggedright = ##t
> %%%%raggedlast=##t
> \context { \GrandStaff \accepts "Lyrics"}
> }
> \midi {
> \tempo 4=100
> }
> }
>
>
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--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe
=============================================