Re: Clef change after end-repeat before break -- how?

[Jean Abou Samra]

On 27/01/2023 22:35, Ole V. Villumsen wrote:
> Hi, I am typesetting a movement with a repeat and a clef change right after 
> the repeat. I have a suitable line break where the repeat ends and the clef 
> change happens. Default Lilypond sets the new clef within the repeat, before 
> the end-repeat sign, which I don’t want and find meaningless in my case since 
> there is no clef change when repeating from the beginning, only when 
> continuing after the repeated section. Instead I want the clef after the 
> end-repeat and before the line break. I can do that by setting the clef 
> change off from the repeated section by a small space. Only the space comes 
> out much larger than expected.
> 
> Tiny example:
> 
> \version "2.24.0"
> 
> \relative c' {
>   \repeat volta 2 {
>     g'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 8 8 |
>   }
>   s1024
>   \clef bass
>   \break
>   \set Timing.measurePosition = #(ly:make-moment 0/4)
>   c,,4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
> }
> 
> I enclose the output as png. My 1024th spacer rest is broader than the two 
> preceding quavers (8th notes) combined.
> 
>  * Curious question: why is that?


Not sure, but my guess is that LilyPond might be trying to make different
measures have not-too-distant lengths. This is just a guess; I didn't try
to investigate, because:


>  * Constructive question: how to avoid it?


Don't use a spacer rest in the first place. See below.


>  * Real question: How do I set the clef nicely immediately>    after the 
> end-repeat with minimal space between?


Use

\version "2.24.0"

\relative c' {
  \repeat volta 2 {
    g'4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 8 8 |
  }
  \once \override Score.BreakAlignment.break-align-orders =
  ##((left-edge staff-ellipsis cue-end-clef ambitus breathing-sign 
signum-repetitionis cue-clef staff-bar clef key-cancellation key-signature 
time-signature custos)
     (left-edge staff-ellipsis cue-end-clef ambitus breathing-sign 
signum-repetitionis clef cue-clef staff-bar key-cancellation key-signature 
time-signature custos)
     (left-edge staff-ellipsis ambitus breathing-sign signum-repetitionis clef 
key-cancellation key-signature time-signature staff-bar cue-clef custos))
  \clef bass
  \break
  c,,4 4 4 4 | 4 4 4 4 | 4 4 4 4 | 4 4 4 4 |
}



I just took the default on
https://lilypond.org/doc/v2.24/Documentation/internals/breakalignment
and moved "clef" after "staff-bar" in the first list.

Best,
Jean

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