Bonjour Gérard,
Une solution :
\version "2.20.0"
{
%%% juste pour la présentation
\omit Staff.Clef
\omit Staff.TimeSignature
\set Timing.measureLength = #(ly:make-moment 3/4)
\partial 8 s8
%%%%%%%%%%%%%%%%%%%%%%%%%%%
<<
{
\voiceTwo
\once\override NoteColumn.force-hshift = #3
\once\override ParenthesesItem.font-size = #2
\teeny \parenthesize c'2.
}
\\
{
\voiceOne
\once\override Dots.extra-offset = #'(-2.5 . 0)
g2.^"(p. finir)"}
>>
R2. ^"sans accord"
\bar "||"
\mark\markup\circle\musicglyph #"scripts.segno"
}
Cordialement,
Pierre