Re: Ties and retrograde

[Simon Albrecht]

On 14.08.2016 20:35, address@hidden wrote:
> The \retrograde function doesn't seem to handle ties at all, as seen in
> this example, which engraves only one tie:
>
> music = { c'4~ c'8 g'8 }
>
> \new Staff {
>    \music
>    \retrograde \music
> }
>
> The notation manual mentions that "manual" ties are not handled, and
> suggests that "some" ties can be generated automatically instead, by
> entering longer notes and using automatic note splitting to break them at
> bar lines.  But that doesn't work for me, because I have a note made up of
> a quarter and a sixteenth tied together across the middle of a bar, not
> across a bar line.  Does someone perhaps have a snippet that will do
> retrograde with correct handling of this kind of tie?

If anything, I would have thought something like this would work:

%%%%%%%
\version "2.19.45"

music = \context Bottom <<
  { c'4*5/4 d'16 e' f' }
  { s4 \bar "" s }
>>

\new Staff {
  \music
  \retrograde \music
}

\layout {
  \context {
    \Voice
    \remove "Note_heads_engraver"
    \consists "Completion_heads_engraver"
  }
}
%%%%%%%%

But in fact this doesn’t split the notes. I recall that I have been 
having problems with invisible bar lines triggering 
Completion_heads_engraver, and I tried to make advantage of that, but 
Lily doesn’t cease to surprise you…

Best, Simon