\version "2.18.2"

roundP = \markup {
   \halign #-0.25 \lower #4 \concat { \bold { \italic ( }
        \dynamic p \bold { \italic ) } } }

mezzoP = \markup {
  \halign #-0.3 \lower #4 \dynamic mp
}

mezzoF = \markup {
  \halign #0 \lower #4 \dynamic mf
}

forte = \markup {
  \halign #0 \lower #4 \dynamic f
}

tenuto = \markup { \italic ten. }

tenutoH = \markup { \raise #2.5 \italic ten. }

\score {
\midi {}
\layout {
  indent = #0
 %line-width = #120
  ragged-right = ##f
}
\new PianoStaff \with {
  \override StaffGrouper.staffgroup-staff-spacing.basic-distance = #20
} {
  <<
  \new Staff \relative c' {
    \key g \major
    \set Score.currentBarNumber = #8
    \bar ""
      {<c a'>4-._\roundP <c e>-. <c e a>-.
    <<
      { b'8( a | g2) }
      \\
      { c,4 | r4 <b d> }
    >>
    d4_\mezzoF d | <d d,>^\(\arpeggio <g, b g'> <d' b>\< <b d b'>\arpeggio |
    <b d b'>\arpeggio
    \once \override TextScript.extra-offset = #'(4 . 0)
    <a d fis a>\!\)_\markup { \lower #4 { \italic etc... } }\arpeggio
      }
    }
    
  \new Staff \relative c {
    \clef "bass"
    \key g \major
    <<
      { r4 g'!2( fis4) | r d d d | r2 d4 r | r fis }
      \\
      { a,2( d |
        <<
          { g,) r | <g, g'>\arpeggio g' | <d d'> }
          \new PianoStaff {
            <<
            \new Staff \with {
              \remove "Time_signature_engraver"
            }
            \relative c' {
              \key g \major
              <<
                { g'2 }
                \\
                { r4 <b, d> }
              >>
              <b b'>4^\tenuto(_\mezzoF\arpeggio <cis b'> |
              \override TextScript.avoid-slur = #'inside
              \override TextScript.outside-staff-priority = ##f
              <b' d,> <d, fis a>\>\arpeggio <e a e'>^\tenutoH\arpeggio <fis e'>\arpeggio |
              <g e'>\! \once \override TextScript.extra-offset = #'(4 . 0) <d d'>)_\markup { \lower #4 { \italic etc... } }
            }
          \new Staff \with {
            \consists "Span_arpeggio_engraver"
            \remove "Time_signature_engraver"
          }
          \relative c {
            \clef "bass"
            \key g \major
            \set Staff.connectArpeggios = ##t
            <<
              { r4 d d\arpeggio e | r2 r4 <fis a>\arpeggio | r4 <g b> }
              \\
              { g,2 g\arpeggio <fis fis'>(\arpeggio <c c'>\arpeggio | <b b'>)\arpeggio }
            >>
          }
            >>
          }
        >>
      }
    >>
  }
  >>
}
}