Re: Sub-music

[Johan Vromans]

Reinhold Kainhofer <address@hidden> writes:

> The solution really depends on what you want to do with it.

For a piece of music, I want to generate score and midi.

Score is no problem.

The midi needs to be fold out w.r.t. repeats (unfoldRepeats can do that)
but there are also Segno / D.S. and D.C. sections.

Fold out, the piece becomes the following measures:

1, 2…36, 37, 22…36, 38, 2…20, 39…89

The current approach that I have works, but is rather tedious:

For each voice:

highMusic = {
  \tag #'scoreOnly {
    \highMusicPartOne
    \bar "||" \mark \markup { \musicglyph #"scripts.segno" }
    \highMusicPartTwoA
    \bar "||"
    \override Score.RehearsalMark #'self-alignment-X = #RIGHT
    \mark \markup { \left-align \vcenter \bold "To Coda  " \musicglyph 
#"scripts.coda" }
    \highMusicPartTwoB
    \repeat volta 2 {
      \highMusicPartThree
    }
    \alternative {
      { \highMusicPartFourA }
      { \highMusicPartFourB }
    }
    \bar "||"
    \override Score.RehearsalMark #'self-alignment-X = #LEFT
    \mark \markup { \vcenter { \musicglyph #"scripts.coda" \bold " Coda" } }
    \highMusicPartFive
  }
  \tag #'midiOnly {
    \highMusicPartOne
    \highMusicPartTwoA
    \highMusicPartTwoB
    \highMusicPartThree
    \highMusicPartFourA
    \highMusicPartTwoA
    \highMusicPartTwoB
    \highMusicPartThree
    \highMusicPartFourB
    \highMusicPartTwoA
    \highMusicPartFive
  }
}

So, instead of splitting all voices, I'd like to write the voices in one
piece, and the use measure extraction to create the parts for the midi.

highMusicScore = \relative c' {
  ...
}

highMusic = {
  \tag #'scoreOnly {
    \highMusicScore
  }
  \tag #'midiOnly {
    \extractMusic \highMusicScore s1*0  s1*1    % 1
    \extractMusic \highMusicScore s1*1  s1*19   % 2..20
    \extractMusic \highMusicScore s1*20 s1      % 21
    \extractMusic \highMusicScore s1*21 s1*15   % 22..36
    \extractMusic \highMusicScore s1*36 s1      % 37
    \extractMusic \highMusicScore s1*21 s1*15   % 22..36
    \extractMusic \highMusicScore s1*37 s1      % 38
    \extractMusic \highMusicScore s1*1  s1*19   % 2..20
    \extractMusic \highMusicScore s1*38 s1*51   % 39..89
  }
}

-- Johan