\version "2.6.0"

upperRH =  \relative c' {
  \time 4/4
%
  bes'2 bes |
%
  \bar "||"
%
}

lowerRH =  \relative c' {
%
  g'2 g |
%
  \bar "||"
%
}

upperLH =  \relative c {
%
  d'2 d |
%
  \bar "||"
%
}

lowerLH =  \relative c {
%
  <g g'>2 <g g'> |
%
  \bar "||"
%
}

figuresLowerLH = \figuremode {
%
  \override FiguredBass.BassFigure #'direction = #-1
  \override FiguredBass.BassFigure #'kern = #-0.5
%

%
}

continuoRH = \new Staff {
  \set Staff.midiInstrument = "harpsichord"
  {
    \clef G
    \key g \minor
    \transpose c c <<
      \new Voice { \voiceOne \upperRH }
      \new Voice { \voiceTwo \lowerRH }
    >>
  }
}

continuoLH = \new Staff {
  \set Staff.midiInstrument = "harpsichord"
  \set Staff.minimumVerticalExtent = #'(-4 . 2)
  {
    \clef F
    \key g \minor
    \transpose c c <<
      \new Voice { \voiceOne \upperLH }
      <<
	\new FiguredBass { \figuresLowerLH }
	\new Voice { \voiceTwo \lowerLH }
      >>
    >>
  }
}

continuoStaff = \context PianoStaff = "Continuo" <<
  \set PianoStaff.instrument = \markup \column { "Basso" "continuo  " }
  \continuoRH
  \continuoLH
>>