\version "2.18.2"  

partochea = {
\relative c{
<a e' a c>1
<<
{a1}
{s32 e'32~e16~e8~e2.}
{s16 a16~a8~a2.}
{s16 s32 c32~c4.~c2}
>>
\times 2/3 {a8 e' a} \times 2/3 {c a e}
\times 2/3 {a,8 e' a} \times 2/3 {c a e}
a,8[~<a e' a c>] e8[~<e e' a c>] a8[~<a e' a c>] e8[~<e e' a c>]
}
}
partocheb = {
<<
\new Voice \relative c, {<a' e''>4 <a e''> <a e''>4 <a e''>}
\new Voice \relative c, {r8 <a'' c>4 <a c>4 <a c>4 <a c>8}
>>
}
partochec = {
  <<
  \new Voice \voiceOne \relative c {
   e'16 c a e' c a e' c
   e16 c a e' c a e' c
   }
  \new Voice \voiceTwo \relative c {
   a2 a2
   }
  >>
}

\score {

<<
\new Staff
\set Staff.midiInstrument = "acoustic guitar (nylon)"
{\clef "G_8" \partochea \partocheb \partochec}
>>

\midi {}
}