Alternative bar numbering

Setting the alternativeNumberingStyle context property, two additional methods are available for enumerating bar numbers in repeats.

\version "2.24"

music = \relative c' {
  \repeat volta 3 {
    c4 d e f |
    \alternative {
      \volta 1 { c4 d e f | c2 d \break }
      \volta 2 { f4 g a b | f4 g a b | f2 a | \break }
      \volta 3 { c4 d e f | c2 d } } }
  c1 \bar "|."
}

{
  \textMark \markup \large "default"
  \music
}

{
  \textMark \markup \large \typewriter "numbers"
  \set Score.alternativeNumberingStyle = #'numbers
  \music
}

{
  \textMark \markup \large \typewriter "numbers-with-letters"
  \set Score.alternativeNumberingStyle = #'numbers-with-letters
  \music
}

\layout {
  \context {
    \Score
    \override TextMark.Y-offset = #5
  }
}