\version "2.13.22"

%% Identification
voixI =
\context Voice = "voice 1"
\relative c'' { 
  \override Staff.VerticalAxisGroup #'minimum-Y-extent = #'(-6 . 6)
  \override TextScript #'padding = #2.0
  \override MultiMeasureRest #'expand-limit = 1
  \once \override Staff.TimeSignature #'style = #'()
  \clef "treble"
  \key g \major
  \time 2/2
  \repeat volta 2 {
    \mark \markup { \fontsize #2 "Ritournelle" }
    r2 r4 r8 d8
    \bar "|:" d1
    e4 e d4. c8
    b2. b4
    c4 d e d
    c4 b a2
    % 7
    g2 b4. c8
    a2 fis4. fis8
    g2 e4 a
    g4 fis e4. d8
  }
  \alternative {
    {d2. r8 d'8}
    {d,1}  \bar "|:"
  }
  \repeat volta 2 {
    a'4. g8 a4. b8
    % 14
    c2 c4. d8
    b2 b4. c8
    d2 c4. b8
    a2 a4. g8
    fis4. d'8 d4. c8
    b4 b b4. a8
    g4. g8 g2
    % 21	
    e4. e'8 e4. d8
    c4 c c4. b8 a4. b8 b2
    a2 r4 d
    c4. b8 a4. g8
  }
  \alternative {
    g1
    g1
  }
  \bar "|."	
}
%%% A la compilation, j'ai un message qui me dit "qu'il y a plus d'alternatives
%% que de répétitions". Pourtant ce qui est écrit là est conforme au texte original.

voixII = 
\context Voice = "track 2"
\relative c {
  \override TextScript #'padding = #2.0
  \override MultiMeasureRest #'expand-limit = 1
  \once \override Staff.TimeSignature #'style = #'()
  \clef "bass"
  \key g \major
  R1
  \repeat volta 2 {
    r4 r8 g'8 g2
    c,4 c d4. d8
    e4. fis8 g4. g8
    a4 b c b
    a4 g d2
    % 7
    e2 e4. e8
    e2 dis4. dis8
    e2 e4 e
    cis4 d
    a4. d8
  }
  \alternative {
    d1
    d1
  }
  \repeat volta 2 {
    d4. d8 c4. b8
    % 14
    a2 a4. a8
    e'2 d4. c8
    b2 c4 c
    d2 cis4. d8
    d1
    r4 r8 g8 g4. f8\!
    e4. e8 e4. d8
    % 21
    c4. c8 c4. b8(
    a4.) a'8 a4. g8
    fis4. fis8 g2
    d2 r4 b
    c4 c d4. g,8
  }
  \alternative {
    g1
    g1
  }
}
voixIII =
\context Voice = "voice 3"
\relative c { 
  \override Staff.VerticalAxisGroup #'minimum-Y-extent = #'(-6 . 6)
  \override TextScript #'padding = #2.0
  \override MultiMeasureRest #'expand-limit = 1
  \once \override Staff.TimeSignature #'style = #'()
  \clef "bass"
  \key g \major
  \time 2/2
  g1
  \repeat volta 2 {
    g'1
    c,2 d
    e4. fis8 g2
    a4 b c b
    a4 g d2
    % 7
    e2 e2~
    e2 dis2 e1
    cis4 d a2
  }
  \alternative {
    {d,2 d'}
    d,1
  }
  \repeat volta 2 {
    d'2 c4. b8
    % 14
    a1
    e'2 d4. c8
    b2 c
    d2 cis
    d4. e8 fis4 d
    g2 g4. f8
    e2 e4. d8
    % 21
    c2 c4. b8
    a2 a'4. g8
    fis2 g
    d2 b
    c2 d
  }
  \alternative {
    {g,4 a b g}
    g1
  }
}

%%------------------------------------
%%% Edition portée system 
\score {
  <<
  \new Staff  {\voixI }

  \new Staff \with { %%colorisation de cette portée
      \override StaffSymbol #'stencil = #(lambda (grob)
        (let* ((staff (ly:staff-symbol::print grob))
               (X-ext (ly:stencil-extent staff X))
               (Y-ext (ly:stencil-extent staff Y)))
         (set! Y-ext (cons
            (- (car Y-ext) 2)
            (+ (cdr Y-ext) 2)))
         (ly:grob-set-property! grob 'layer -10)
         (ly:stencil-add
           (ly:make-stencil (list 'color (rgb-color 1 0.8 0.6)
             (ly:stencil-expr (ly:round-filled-box X-ext Y-ext 0))
           X-ext Y-ext))
         staff)))
      } { \voixII }
\new Staff {\voixIII}		
 >>
 \layout { }
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%