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Re: Two staves to one while dropping the bracket?

From: Mats Bengtsson
Subject: Re: Two staves to one while dropping the bracket?
Date: Wed, 30 Jun 2004 18:00:34 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040616

It seems it's not enough to add the Hara_kiri_engraver, you
have to copy also another line from the definition of
RemoveEmptyStaffContext in ly/engraver-init.ly

\notes\new StaffGroup <<
\new Staff {c1 c c c c c c c \break e e e e e e e e \break d1 d d d d d d d}
  \new Staff {c1 c c c c c c c \break R1*8 d1 d d d d d d d}
  \new Staff \with {
    \remove "Axis_group_engraver"
    \consistsend "Hara_kiri_engraver"
  }{c1 c c c c c c c R1*8 d1 d d d d d d d}

If you comment out the \remove ... line, LilyPond hangs just
as you described. Looks like a bug to me, even though we are
playing with the internal details of LilyPond here.


Ralph Little wrote:
Hi Mats,
I have a related question.
I have a score where I wish to use the \RemoveEmptyStaffContext on one
staff of a staff group only. The reason for this is that I have a part
which is separate but only exists for a few bars in the entire piece,
and I don't want it to occupy a line on every page of the score.
However, all other parts I do, even if they only have bars rest.

I can't remember exactly what I tried, but I think it involved using the
new \with syntax to add the HaraKiri engraver, like:

\score {
        \new StaffGroup {
                \new Staff \SoloCornet
                \new Staff \with { \consists "Hara_kiri_engraver"}
..or something like that.

I could put together a simple example if nothing comes immediately to

What happened is that lilypond just "hung".

Do you know if anybody has used this in this way?
Lilypond 2.2 BTW.


Mats wrote:

One solution is to use the \RemoveEmptyStaffContext and simply insert
multimeasure rests in the second stave. Then, LilyPond will
automatically remove the second stave and the opening brace on the
lines where there are no notes.


uppervoice=\new Staff \notes\relative c'{
c d e f g a b c c b a g f e d c
c d e f g a b c c b a g f e d c
c d e f g a b c c b a g f e d c

lowervoice=\new Staff \notes\relative c''{
c b a g f e d c c d e f g a b c \break
R1*4 \break
c4 b a g f e d c c d e f g a b c }

   \new GrandStaff <<
     \context {


Alex Klein wrote:

a month ago I had a little problem which I still haven't found a
solution for. I was engraving a piece of music where the first violin


split into upper and lower voice, which was notated by using two


and a group bracket. At one time in the piece, the split is lost and


first violins play in unison. I was able to drop the second stave, but
no matter what I did, there was always a group bracket around the


stave left.
What is the correct way to engrave this?


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        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Phone: (+46) 8 790 8463                         
        Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe

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