\version "2.18.2"


BassonUn = \relative c' {
  \clef bass
  \time 4/4
  R1*30
  \voiceOne
  \repeat unfold 200 { c4 }
  \oneVoice R1*20
  
}

BassonDeux = \relative c' {
  \clef bass
  \time 4/4
  s1*30
  \voiceTwo
  \repeat unfold 200 { a4 } s1*20
  
}

BassonTrois = \relative c {
  \clef bass
  \time 4/4
  R1*30
  \repeat unfold 50 { c4 } r2
  R1*57
  
}

Hautbois = \relative c' {
  \time 4/4
  \repeat unfold 200 { c2 }
}

\score {
  
  <<
   \new Staff 
   \with {
        instrumentName = "1 HAUTBOIS"
        shortInstrumentName = "Htb."
      }
      <<
      \new Voice = "Hautbois"  \Hautbois
      >>
  
      \new PianoStaff     
     \with {
        instrumentName = "3 BASSONS"
        shortInstrumentName = "B.ons"
        
      } 
   <<
        
     \new Staff = "up" {    
      <<
      \new Voice = "BassonUn" \BassonUn 
      \new Voice = "BassonDeux"  \BassonDeux 
      >>      
     }
     
    
    \new Staff = "down" {
      <<
        \new Voice = "BassonTrois"  \BassonTrois
      >>
    } 
    
  >>
  
  >>

\layout { \context { 
  \Staff \RemoveEmptyStaves
  \override VerticalAxisGroup.remove-first = ##t
} }
  
  
}

#(set-global-staff-size 15)

\paper {
   
  top-margin = 20\mm     % marge supérieure
  bottom-margin = 10.6\mm  % marge inférieure
  indent = 2.0\cm
  short-indent = 1\cm
  
}