\version "2.5.25"

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% do stuff in 16pt. font.
#(set-global-staff-size 16)
#(set-default-paper-size "letter")

\paper
{
    bottommargin = 1.0\cm
    topmargin = .5\cm
    leftmargin = 2.0\cm
    linewidth = \hsize - 4.0\cm
    raggedbottom = ##t
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

clarinetnotessectiona = \transpose bes, c {

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %
    % if you change this to an unfold repeat then the MIDI screw up doesn't
    % happen below.
    %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    \repeat volta 2 {
        a'8. d''16 fis''16 a''16 |
        gis''8 a''8. \glissando gis''16 \glissando |
        a''8 b''8 \times 2/3 { c'''16 [ b''16 a''16 ] } |
        g''8 fis''8 e''16 d''16 |

        a'8. d''16 fis''16 a''16 |
        fis''32 a''32 gis''8. \times 2/3 { c'''16 [ b''16 a''16 ] } |
        gis''32 b''32 a''16 ~ a''4 |
        g''8 fis''8 \times 2/3 { fis''16 [ e''16 d''16 ] } |

        a'8. d''16 fis''16 a''16 |
        gis''16 a''4 \glissando gis''16 \glissando |
        a''8 b''8 \times 2/3 { c'''16 [ b''16 a''16 ] } |
        g''8 fis''8 e''16 d''16 |

        e''8. b''16 a''16 g''16 |
        fis''8. d''32 fis''32 e''16 cis''32 e''32 |
        d''8. d'''16 a''16 fis''16 |
    }
    \alternative {
        {
            d''4 gis'8 |
        }
        {
            d''4. |
        }
    }

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %
    % MIDI error occurs here!!!!
    %
    % transition after unfolded repeat causes the remaining notes
    % to get very messed up in the midi.
    %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    d'''4. ~ |
    d'''4 e'''8 |
    c'''4. ~ |
    c'''8 d'''8 d'''8 |
    b''4. ~ |
    b''8. a''16 \times 2/3 { c'''16 [ b''16 a''16 ] } |
    gis''32 b''32 a''16 ~ a''4 ~ |

    a''8. a'32 b'32 cis''32 d''32 e''32 eis''32 |
}

clarinetnotes = {
    \key a \major
    \time 3/8
    \clarinetnotessectiona
    \bar "|."
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\book
{
    \score {
        \override Score.BarNumber   #'padding = #2.0

        \new Staff \with {
            instrument = \markup { "Clarinet" }
            instr = \markup { "Cla." }
        }  {
            \clef violin
            \new Voice { \clarinetnotes }
        }
        \layout {
            latexoptions=twoside
        }
    }
}

\score {
    \unfoldrepeats {
        \context Staff = "clarinet" \with {
            midiInstrument = "clarinet"
        }  {
            \new Voice { \transposition bes \clarinetnotes }
        }
    }
    \midi { \tempo 8 = 135 }
}