Re: Adding / deleting staves on the fly

[Reinhold Kainhofer]

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Am Dienstag, 31. Juli 2007 schrieb Risto Vääräniemi:
> I've been trying to find out how to create and delete staves on the fly.
> This would be very useful especially in choir music when one voice is quiet
> for a long time 

Hiding "empty" staves is easy, see below.

> or when a voice is divided and it is no longer convenient 
> to cram them into one staff.

that's something I can't answer...

> Another issue is starting a song with just one voice and forcing the staff
> to start with the ChoirStaff. One workaround was introduced (below) but I
> couldn't use it to add a new staff for the next system.
>
> http://www.nabble.com/One-staff-in-ChoirStaff-tf1934152.html#a5299462

If you simply want staves with rests only to disappear, simply add the 
RemoveEmptyStaffContext to your layout. To force this to also apply to the 
first system of a score, set #'remove-first of VerticalAxisGroup to ##t:

\layout{
  \context {
    \Score
    % Remove all-rest staves, even in the first system
    \override VerticalAxisGroup #'remove-first = ##t
  }
  \context {
    \RemoveEmptyStaffContext 
  }
}

However, this will not print the choir bracket if only one staff is left. In 
this case, the Lilypond Snipplet Repository comes to help:
http://lsr.dsi.unimi.it/LSR/Item?id=201

Simply add 
  \context {
    \ChoirStaff 
    % If only one non-empty staff in a system exists, still print the backet
    \override SystemStartBracket #'collapse-height = #1
  }

to the \layout section, too. As an example you can check my Litaniae 
Lauretanae KV 109 at CPDL:
http://www.cpdl.org/wiki/index.php/Litaniae_Lauretanae_BMV_-_KV_109_(Wolfgang_Amadeus_Mozart)

The lilypond files can be downloaded there, too.


As for dynamically splitting/combining multiple voices into multiple/single 
staves when needed, that's a problem where I would like to get an answer, too 
(I need it for a mass where the soloists staves can be combined into the 
choir staff most of the time, only in one place do they sing together with 
the choir).

Cheers,
Reinhold


- -- 
- ------------------------------------------------------------------
Reinhold Kainhofer, Vienna University of Technology, Austria
email: address@hidden, http://reinhold.kainhofer.com/
 * Financial and Actuarial Mathematics, TU Wien, http://www.fam.tuwien.ac.at/
 * K Desktop Environment, http://www.kde.org, KOrganizer maintainer
 * Chorvereinigung "Jung-Wien", http://www.jung-wien.at/
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