Re: Key change with clef after the bar line?

[Jean Abou Samra]

Le 27/02/2022 à 09:31, Jean Abou Samra a écrit :
> Le 27/02/2022 à 08:09, Alasdair McAndrew a écrit :
> > In my current project, I'm trying as far as possible to replicate the 
> > spirit of the original 18th century publication, in which a key 
> > change has a clef printed, and both after the bar line.  In one 
> > piece, there's a segno in the middle of a bar, with such a key 
> > change.  In standard Lilypond, this micro-example shows that the 
> > printed clef comes before the bar line (I've left out the segno 
> > marker and all other markers outside the score):
> >
> >     global = {
> >       \language english
> >
> >       \clef treble
> >       \time 4/4
> >     }
> >
> >     \relative c' {\key c \major c4 d e fs | g a \bar "||" \set
> >     Staff.forceClef = ##t \key c \minor bf c | bf af g f | ef d c2 }
> >
> >
> > But modern practice is to put the clef before the double bar, and the 
> > key change afterwards. I want the clef to come after that double 
> > bar.  According to the documentation, this can be changed with 
> > "break-alignment", in particular with:
> >
> >     \override Score.BreakAlignment #'break-align-orders =
> >     #(make-vector 3 '(span-bar
> >        breathing-sign
> >        staff-bar
> >        key
> >        clef
> >
> >      time-signature))
> >
> >
> > However, in the mini example just given above, adding that override 
> > in the global declaration has no effect.  I tried changing the order 
> > of "key" and "clef" in the override, again with no effect.  (When I 
> > tried his in a larger piece, the key change was printed on the 
> > bar-line!)
> >
> > Is there any way I can notate a key change, at a segno with an extra 
> > bar line, in order: bar line, clef, key ?
>
>
> Well, the \global is unused in your example, so it's not
> surprising that the override has no effect. With that
> oversight corrected, the problem is that the break align symbol
> for a KeySignature is not 'key but 'key-signature. You
> will find this at
> http://lilypond.org/doc/v2.23/Documentation/internals/keysignature
> (the break-align-symbol property). So this works:
>
> \version "2.22.1"
>
> \language english
>
> global = {
>   \clef treble
>   \time 4/4
>   \override Score.BreakAlignment.break-align-orders =
>   #(make-vector 3 '(span-bar
>                     breathing-sign
>                     staff-bar
>                     clef
>                     key-signature
>                     time-signature))
> }
>
> \relative c' {
>   \global
>   \key c 
> \majorhttps://lilypond.org/doc/v2.23/Documentation/notation/adjusting-horizontal-spacing-for-specific-layout-objects



Obviously that was a copy-paste problem …


\version "2.22.1"

\language english

global = {
  \clef treble
  \time 4/4
  \override Score.BreakAlignment.break-align-orders =
  #(make-vector 3 '(span-bar
                    breathing-sign
                    staff-bar
                    clef
                    key-signature
                    time-signature))
}

\relative c' {
  \global
  \key c \major
  c4 d e fs |
  g a
  \bar "||"
  \set Staff.forceClef = ##t
  \key c \minor
  bf c |
  bf af g f |
  ef d c2
}