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String quartet template with separate parts

The “String quartet template (simple)” snippet produces a nice string quartet, but what if you need to print parts? This new template demonstrates how to use the \tag feature to easily split a piece into individual parts.

For technical reasons, multiple output files cannot be shown here for a single snippet, which means that the template below unifies the code for separate files. The file names are contained in comments at the beginning of each file.

piece.ly contains all the music definitions. The other files – score.ly, vn1.ly, vn2.ly, vla.ly, and vlc.ly – produce the full score and the four parts.

Do not forget to remove specified comments when using separate files!

% piece.ly
% (This is the global definitions file.)

global= {
  \time 4/4
  \key c \major
}

Violinone = \new Voice \relative c'' {
  c2 d e1
  \bar "|."
}

Violintwo = \new Voice \relative c'' {
  g2 g e1
  \bar "|."
}

Viola = \new Voice \relative c' {
  \clef alto
  e2 d c1
  \bar "|."
}

Cello = \new Voice \relative c' {
  \clef bass
  c2 b a1
  \bar "|."
}

music = <<
  \tag #'score \tag #'vn1
  \new Staff \with { instrumentName = "Violin 1" }
    << \global \Violinone >>

  \tag #'score \tag #'vn2
  \new Staff \with { instrumentName = "Violin 2" }
    << \global \Violintwo >>

  \tag #'score \tag #'vla
  \new Staff \with { instrumentName = "Viola" }
    << \global \Viola >>

  \tag #'score \tag #'vlc
  \new Staff \with { instrumentName = "Cello" }
    << \global \Cello >>
>>


% These are the other files you need to save on your computer

% score.ly
% (This is the main file.)

% Uncomment the line below when using a separate file.
% \include "piece.ly"

#(set-global-staff-size 14)

\score {
  \new StaffGroup \keepWithTag #'score \music
  \layout { }
  \midi { }
}


%{ Uncomment this block when using separate files.

% vn1.ly
% (This is the Violin 1 part file.)

\include "piece.ly"
\score {
  \keepWithTag #'vn1 \music
  \layout { }
}

% vn2.ly
% (This is the Violin 2 part file.)

\include "piece.ly"
\score {
  \keepWithTag #'vn2 \music
  \layout { }
}

% vla.ly
% (This is the Viola part file.)

\include "piece.ly"
\score {
  \keepWithTag #'vla \music
  \layout { }
}

% vlc.ly
% (This is the Cello part file.)

\include "piece.ly"
\score {
  \keepWithTag #'vlc \music
  \layout { }
}

%}