Re: Time signatures for all parts

[Carl Sorensen]

From: lilypond-user <lilypond-user-bounces+carl.d.sorensen=gmail....@gnu.org> 
on behalf of Erika Pirnes <erika.pir...@hotmail.com>
Date: Tuesday, October 12, 2021 at 8:09 AM
To: "lilypond-user@gnu.org" <lilypond-user@gnu.org>
Subject: Time signatures for all parts

I'm writing an orchestra piece with a lot of time signature changes. I was 
wondering if there is a way to put all the time signature changes into one 
place, and use that in all parts? For example, if I want to later change a 6/4 
to 3/2, I would only need to change it in one place and not for all parts 
separately.

The longstanding “canonical” answer for this is to create a global part (often 
called “global”, but the name is not significant) that contains time 
signatures, tempo changes, etc. that apply to all parts.  Then you put the 
global part in parallel with the appropriate parts in the scores you are 
creating.

\version "2.22"

global = {
  \time 4/4
  \key c\major
  s1*2
  \time 3/4
  s2.*2
  \key g\major
  s2.*2
}

partOne = \relative {
  \clef treble
  c'4 d e f|
  f4 e d c |
  c d e |
  f g a |
  g fis e |
  e fis g
}

partTwo = \relative {
  \clef bass
  c4 d e f|
  f4 e d c |
  c d e |
  f g a |
  g fis e |
  e fis g
}

\score {
  \new StaffGroup <<
    \new Staff <<
      \global
      \partOne
    >>
    \new Staff <<
      \global
      \partTwo
    >>
  >>
  \layout{}
}

\score {
    \new Staff <<
      \global
      \partOne
    >>
    \layout{}
}

\score {
    \new Staff <<
      \global
      \partTwo
    >>
    \layout{}
}