Not interested in midi meaning of \repeat volta etc.

[Peter Gentry]

\tempo "Allegro Moderato"4=86

 \key c\major

 \time 4/4

 r2.  e''4  \bar "|:"  % 1

 \repeat volta 2 {

  e''8 [  a''8 ]  a''4 (  a''8 )  [  c'''8 ]  b''16 [  a''16 gis''16 a''16 ]   |  % 2

 …….more music

c''4 r4.  g''16 [  a''16 ]  b''16 [  c'''16 d'''16 b''16 ]   |  % 69

}

 \alternative {

  {c'''4 c'''4 c'''4 e''4 }   % 70

  {c'''4 c'''4 c'''4 r4}

  }

 …….rest of music

Works for me

regards
Peter Gentry