The musical notation in this image was rendered by LilyPond, a free-software engraving program. Here is a listing of the LilyPond source used to create this file.

\version "2.12.3"

\paper {
    indent = #0
    %printallheaders = ##t
    %print-all-headers = ##t
    ragged-right = ##f
    %ragged-bottom = ##t
    print-page-number = ##f
    oddHeaderMarkup = ""
    evenHeaderMarkup = ""
    oddFooterMarkup = ""
    evenFooterMarkup = ""
}

\layout {
   \context { \Score
        \override MetronomeMark #'padding = #'0
        \override TextScript #'padding = #'5
        \remove "Bar_number_engraver"
   }
   \context { \Staff
        \override TimeSignature #'style = #'numbered
   }
}

melody = #(define-music-function (parser location inTab) (boolean?)
#{
    \set Staff.midiInstrument = #"overdriven guitar"

    %\tempo 4=160
    \clef #(if $inTab "tab" "treble_8")
    \key c \major
    \time 4/4
    \oneVoice

%   1           .     2     .     3      .    4     .     :
    a,4 _"I"          b,4         c4          a,8   b,8~
    b,8         c4          a,8   b,4         c4
    f,4 _"VI"         g,4         a,4         f,8   g,8~
    g,8 _"VII"  a,4         g,8   c4          b,4

#})

harmony = \chords {
    \set chordChanges = ##t
    %\set ChordNames.midiInstrument = #"overdriven guitar"

    a1:m
    a1:m
    f1
    g1
}

% Score - melody and chords
\score {
    <<
    \harmony

    \new Staff {
        \context Voice = "Guitar" {
            \autoBeamOff
            \melody ##f
        }
    }
    >>

    \layout { }
}

% MIDI - melody only, no chords
\score {
    \new Staff {
        \context Voice = "Guitar" {
            \autoBeamOff
            \melody ##f
        }
    }

    \midi {
        \context { \Staff
            \remove "Staff_performer"
        }
        \context { \Voice
            \consists "Staff_performer"
        }
        \context { \Score
            tempoWholesPerMinute = #(ly:make-moment 160 4)
        }
    }
}

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