\version "2.18.2"  % necessary for upgrading to future LilyPond versions.  #(set-default-paper-size "a4" 'landscape)  \header{   title = \markup{Sonate n\hspace #-1 \super{o}8 (K310)}   composer = "Wolfgang Amadeus Mozart (1778)" }  \score{ <<     \new PianoStaff    <<    \new Staff \relative c'' {    \set Score.barNumberVisibility = #all-bar-numbers-visible    \set Score.currentBarNumber = #45    \set Staff.midiInstrument = "acoustic grand"    \bar ""    \clef "G" \key c \major    \time 4/4    \mark "Allegro maestoso"       c4 <c e>8. <c e>16 <c e>4 <c e>8. <c e>16    <c d>4 <c d>8. <c d>16 <b d>4 <b g'>8. <b g'>16    <c e>4 <c e c'>8. <c e c'>16 <c e c'>4 <c e c'>8. <c e c'>16    <d a' c>4 <d a' c>8. <d a' c>16 <d g b>4 <d g b>8. <d g b>16    <e g c>4\arpeggio <c e g>\arpeggio <g c e>\arpeggio r4 \bar "||" }     \new Staff \relative c' {    \set Score.barNumberVisibility = #all-bar-numbers-visible    \clef "F" \key c \major    \set Staff.midiInstrument = "acoustic grand"      c16_"I"[ d e d] c[ b a gis] a_"vi"[ b c b] a[ g f e]   f_\markup{IV\hspace #-0.5 \super{6}\hspace #-1.5 \sub{5}}[ g a g] f[ d e f] g_"V"[ fis g fis] g[ f e d]   c_"I"[ d e d] c[ b a gis] a_"vi"[ b c b] a[ g f e]   f_\markup{IV\hspace #-0.5 \super{6}\hspace #-1.5 \sub{5}}[ g a g] f[ d e f] g_"V"[ fis g fis] g[ f e d]   c4 < c c'> <c c'> r4    }    >>  >>  \layout { } \midi { } }