Repeats with alternative endings and MIDI

[Olivier Biot]

Hi all,

I am typesetting a 2-staff cello etude with a volta with alternative endings.

I am following the instructions from the documentation:
http://lilypond.org/doc/v2.16/Documentation/notation/repeats-in-midi

(I.e., write all repeats and voltas in all staffs)

And I am using articulate.ly as in the documentation:
http://lilypond.org/doc/v2.16/Documentation/notation/the-articulate-script

However I can't get the MIDI to do what is expected.

Here's a relevant snippet:

%%% BEGIN
\version "2.16.1"

theMusic = \new StaffGroup <<
  \new Staff \with {midiInstrument = #"cello"} {

    \relative c {
      \key c \major
      \time 4/4
      \tempo "Cantabile"
      \clef "bass"
      \repeat volta 2 {
        <c-4 e-1>2-\p << { g'4.-4 ( f8 ) } \\ { b,2-3 } >>        | % 1

        <c!-2 fis-1>4 << { g'2-4 ( f4 ) } \\ { b,-3 a2-1 } >>        | % 11
      } \alternative {
        { <c-2 a'-1>2 ( <b g'>4 ) r        | } % 12
        { << { c'8-4 ( a-1 e-1 cis-3 ) g' ( d ais'-2 b-3 ) } \\ { g,2 g } >>        | } % 13

      }
      << { c'8 ( a! e cis ) g' ( d ais' b      ) } \\ { g,2 g } >>        | % 14 ( = 13)
      <g f'!>8-\f b'-3 ( d-3-\flageolet ) <g,, f'> ( <gis-1 f'-2> ) b'-3 ( d-3-\flageolet ) <gis,,-1 f'-2>    | % 15

      \bar "|."
    }
  }

  \new Staff \with {midiInstrument = #"cello"} {
    \relative g, {
      \key c \major
      \clef "bass"
      \repeat volta 2 {
        << { g4 ( c ) d ( g, ) } \\ { c,2 g'4 s } >>    | % 1

        d2 d            | % 11
      } \alternative {
        { << { fis'8 ( d e fis ) } \\ { g,2 } >> <g g'>8 ( g f! d ) }        | % 12
        { e'4 ( c8 a ) b4 ( d8 g ) }        | % 13

      }
      e4 ( c8 a ) b4 ( d8 g )        | % 14 (= 13)
      b r r b ( b ) r r b            | % 15
    }
  }

>>


\score {
  \theMusic

  \layout {
    \context {
      \Staff

      \override Fingering #'add-stem-support = ##t
      \override Fingering #'avoid-slur = #'outside
      \override TupletBracket #'bracket-visibility = ##t
    }
  }
}

\include "articulate.ly"

\score {
  \unfoldRepeats \articulate << \theMusic >>
  \midi {}
}
%%% END

If you wonder why I import articulate.ly at the end, it's because of some strange side-effect it has on music expressions even without calling the articulate command, which I posted in another thread:

http://lilypond.1069038.n5.nabble.com/Unexpected-side-effect-of-articulate-ly-on-aftergrace-tp137289.html

Best regards,

Olivier