Re: grace note leading to chord [solved]

[Gilles THIBAULT]

Yes, perfect solution
I tested an acciaccatura with a chord and with a single note : it's 
absolutly the same :

%%%%%%%%%%%%%%%%%%%%%

\version "2.10.25"

\new Staff {
      <<
           {
               \slurDown
                   \acciaccatura b'8
                       \once \override NoteHead #'X-extent = #'(0.0 . 0.0)
                   \hideNotes c''4  \unHideNotes
               \slurNeutral
           }
           {
               < e' g' c''>4
           }
       >>

       \acciaccatura b'8  c''4
}

%%%%%%%%%%%%%%%%%%%%%%

I had never really understood the X-extent property, i think now i 
understand a bit more. Thank you Valentin.

A day, when i am a shemer, i'll try to make a function to make that staff 
automatic.

(  with this syntax for exemple  \acciaChord b'8 < e' g' c''>4  and the 
function will take the first element of the chord ).

A day ...

Gilles