Re: Inserting a one-time Volta bracket

[Lukas-Fabian Moser]

Hi Brent,

Am 15.06.21 um 06:41 schrieb Brent Annable:
> I'm trying to create the effect in the picture, of a one-time Volta 
> bracket above the staff with the text "last time only". I would prefer 
> the text to be inside the bracket, but that's another matter. Right 
> now I'm just looking for a way to get the bracket up there - I've 
> tried using actual Volta repeats and deleting/removing/changing things 
> with tips from previous emails and snippets, but after an hour I'm 
> just not getting anywhere.
>
> Does somebody know an easy way?

Volta brackets seem to insist on getting closed only at a repeat-closing 
bar line.

So I had no better idea than to banish the creation of the Volta bracket 
into a custom context that is independent of what's going on elsewhere:

\version "2.21"

\layout {
  \context {
    \name "Custom"
    \type "Engraver_group"
    \consists Volta_engraver
    \consists Bar_engraver
  }
  \context {
    \Score
    \accepts "Custom"
  }
}

lastTime = \markup \normal-text { last time only }

<<
  \new Custom {
    s1
    \once \set repeatCommands = #`((volta ,lastTime))
    % in standard contexts, \set is reset after each time steps,
    % but obviously I didn't add the necessary engraver, so \once
    s1
    \set repeatCommands = #'((volta #f) end-repeat)
  }
  \new Staff
  {
    a1
    g4 a g a
    \repeat volta 2 {
      g a g a
    }
  }
>>

This feels like a terrible hack, and I'd not be surprised if it blows up 
at the first opportunity. But maybe it can become a starting point for 
future experiments?

Lukas