\version "2.25.1"

\header {
  title = "Dreistimmige Messe in G"
  subtitle = "Credo"
  composer = "Robert Führer"
}
#(set-global-staff-size 20)

\include "score_glb.ily"
\include "music.ily"

\score {
  <<
    \new ChoirStaff <<
      \score_pre
      \transpose c \pitch_a \new Staff << \Mac \Bc >>
      \lyricsto Vac \Lac

      \transpose c \pitch_b \new Staff \Mbc
      \lyricsto Vbc \Lbc
      
      \transpose c \pitch_c \new Staff \Mcc
      \lyricsto Vcc \Lcc
    >>
    \transpose c \pitch_o \new GrandStaff <<
      \new Staff { \Sc << \Vcc \\ \Vbc >> }
      \new Staff { \clef "bass" \Sc \Vac }
    >>
  >>
  \layout {
    \context {
      \ChoirStaff
      fontSize = #-4
      \override StaffSymbol.staff-space = #(magstep -4)
    }
  }
}
\score {
  <<
    \transpose c \pitch_a \new Staff \Mac
    \transpose c \pitch_b \new Staff \Mbc
    \transpose c \pitch_c \new Staff \Mcc
    \transpose c \pitch_o \new Staff { \Sc << \Vcc \\ \Vbc >> }
    \transpose c \pitch_o \new Staff { \Sc \Vac }
  >>
  \midi {
    \midi_tempoC
  }
}