Une autre solution est d'intégrer une polyphonie fictive :
\version "2.18.2"
soprano = \relative c'' {
\clef G
\repeat unfold 2 { \repeat unfold 5 a1 \break }
\repeat unfold 5 a1
}
alto = \relative c' {
\clef C
\repeat unfold 2 { \repeat unfold 5 a1 \break }
\repeat unfold 5 a1
}
basse = \relative c {
\clef F
\repeat unfold 2 { \repeat unfold 5 a1 \break }
\repeat unfold 5 a1
}
tempoSpanner = {
s1*3
\once\override TextSpanner.bound-details.left.text = #"rit "
\once\override TextSpanner.bound-details.right.text = #" a tempo"
\once\override TextSpanner.bound-details.left-broken.text = ##f
\once\override TextSpanner.bound-details.right-broken.text = ##f
s1\startTextSpan
s1*5
s1\stopTextSpan
}
\score {
\new StaffGroup <<
\new Staff \with { instrumentName = Soprano } << \soprano \\ \tempoSpanner >>
\new Staff \with { instrumentName = Alto } \alto
\new Staff \with { instrumentName = Basse } \basse
>>
}
\score {
\new Staff \with { instrumentName = Basse } << \basse \\ \tempoSpanner >>
}
Pierre