Test

<score sound=1> \version "2.12.3"

%%% %%% First part: MINUET %%% mUpperVoice = \relative c {

 \voiceOne
 \slurDown
 \repeat volta 2 {
   g~ g8  f16 e f e d c |
   c4 \grace { d16[ c b] } c8. e16 g,4 |
   g8. a16 b8[ c] d e |
   g4 g16( f ) e f  e4 |
   d8. c16 a'4 c,4 |
   b8. d16 g8[ g] fis f |
   f16( e ) c a g4 \grace { a16[ g fis g] } b8. a16 |
   g4 r r |
 }
 \repeat volta 2 {
   \tuplet 3/2 { g'16([ a ) g] } \tuplet 3/2 { f[ e d] } cis2 |
   d16[ d32( cis ) d16 e] f[ f32 e f16 g] a4 |
   \tuplet 3/2 { f16([ g ) f] } \tuplet 3/2 { e[ d c] } b2 |
   c16[ c32( b ) c16 d] e[ e32( d ) e16 f] g4 |
   c,8..[ e64 g] c4 < gis d b > |
   < a c, >2 < a ees c >4 |
   < g e >8[ \acciaccatura { a8 } <g e >16 <dis fis>16] < g e >8[ < e c >8] < d fis >8[ < b g >8] |
   < f b >4 < e c' > r |
 }

}

mLowerVoice = \relative c {

 \voiceTwo
 \repeat volta 2 {
   c2 d4 |
   e2. |
   f4. e8 d[ c] |
   b2 c4 |
   fis2. |
   g4. g,8 a[ b] |
   c a d2 |
   g,4 r r |
 }
 \repeat volta 2 {
   r4 r8 bes a[ g] |
   f2 r4 |
   r4 r8 aes g[ f] |
   e2. |
   c'2 e4 |
   f2 fis4 |
   g2 g,4 |
   c2 r4 |
 }

}

%%% %%% Second part: VALSE %%% vUpperVoice = \relative c' {

 \voiceOne
 \repeat volta 2 {
   g8 e' d |
   c8. b16 c8 |
   g8 <d' f> <c e> |
   8. <ais cis>16 8 |
   <e g> <dis fis> <d f> |
   e8.[ g16] c8 |
   g, <d' f> <c e> |
   4. |
 }
 \repeat volta 2 {
   cis4 e8 |
   <a, d>8.[ <a e'>16] <f' a,>8 |
   b,4 d8 |
   <c g>8.[ <g d'>16] <e' g,>8 |
   e a fis |
   <d g>8.[ <d f>16] <e c>8 |
   <a, d> f' <f, g b> |
   <e g c>4. |
 }
 \repeat volta 2 {
   <e' g>8 <e g>8 <e g>8 |
   <e c'>4 <e c'>8 |
   << { c'16. b32 a8 b } \\ { \shiftOn \stemDown f4 f8 } >> |
   <e c'>4 <e g>8  |
   g8 a <cis, e> |
   f8. g16 a8 |
   g8 <f d a> <e c a> |
   <d b>4 r8 |
 }
 8   |
 <c ees>8. d16 ees8 |
 fis8 fis fis |
 <b, d g>8. fis'16 g8 |
 <f b>8 <f b> <f b> |
 c'8. b16 c8 |
 d8 d e |
 f4\fermata s8 |
 <e, g>8 <e g> <e g> |
 <e c'>4 <e c'>8 |
 << { c'16. b32 a8 b } \\ { \shiftOn \stemDown f4 f8 } >> |
 <e c'>4 <e g>8 |
 bes'8 a e |
 g f d |
 c[ \grace { d16[ c b c] } e8. d16] |
 <c e,>4. |
 \bar "|."

}

vLowerVoice = \relative c {

 \voiceTwo
 \repeat volta 2 {
   r8 <g' c,> <f b,> |
   <<  { \stemDown c4. } \\ { g'8\rest <g e>8 <g e> } >> |
   r8 b, c |
   g' g g |
   g a b |
   c4. |
   b,4 c8 |
   g'4. |
 }
 \repeat volta 2 {
   bes8 a <g a> |
   f8.[ e16] d8 |
   aes' g <f g> |
   e8.[ d16] c8 |
   c'4 <c d>8 |
   b8.[ gis16] a8 |
   f4 g,8 |
   c4. |
 }
 \repeat volta 2 {
   c8 c c |
   c c c |
   c c c |
   c c c |
   << \stemDown { \shiftOn e'4 } \\ { c,4 a8 } >> |
   << \stemDown { \shiftOn d'4 } \\ { d,4. } >> |
   <c' e,>8 f, fis |
   g8 g8 g8 |
 }
 g4. |
 g8 g g |
 <g c ees>4. |
 g8 g g |
 <g d'>4. |
 << { \shiftOn \stemDown <c e>4. } \\ { g8 g g } >> |
 << { \shiftOn \stemUp b8 b c } \\ { g8 g g } >> |
 <g b d>4. |
 c,8 c c |
 c c c |
 c c c |
 c c c |
 <cis e'>4 <cis a'>8 |
 <d a'>4 <f a>8 |
 g4 <f g,>8 |
 c4. |

}

%%% %%% SYSTEMS %%% \score {

 <<
   \new Staff = "minuet" \with {
     midiInstrument = #"acoustic guitar (nylon)"
     instrumentName = #"MINUET."
   } <<
     \clef "treble_8"
     \time 3/4
     \mergeDifferentlyHeadedOn
     \context Voice = "mUpperVoice" \mUpperVoice
     \context Voice = "mLowerVoice" \mLowerVoice
   >>
 >>
 \layout {}
 \midi {
   \tempo 4 = 100
 }

}

\score {

 <<
   \new Staff = "valse" \with {
     midiInstrument = #"acoustic guitar (nylon)"
     instrumentName = #"VALSE."
   } <<
     \clef "treble_8"
     \time 3/8
     \mergeDifferentlyHeadedOn
     \mergeDifferentlyDottedOn
     \context Voice = "vUpperVoice" \vUpperVoice
     \context Voice = "vLowerVoice" \vLowerVoice
   >>
 >>
 \layout {}
 \midi {
   \tempo 4 = 100
 }

}