\version "2.17.6"
\layout { ragged-right = ##t }

\header{
  texidoc="
This shows how modern cross voice auto cautionary accidentals are handled.
The first two fisses get accidentals because they belong to different voices.
The first f gets cautionary natural because of previous measure.
The last f gets cautionary natural because fis was only in the other voice.
"
}



voicea =  \transpose c c' {
  \stemUp
  fis2 a2 f4 fis a2
}
voiceb =  \transpose c c' {
  \stemDown
  c2 fis2  f4 c   f2
}

<<
  
  \new NoteNames {
    \set printOctaveNames = ##f
    \voicea
  }
  \context Staff << 
    \accidentalStyle modern-voice-cautionary
    \new Voice \voicea
    \new Voice \voiceb
  >>
  \new NoteNames {
    \set printOctaveNames = ##f
    \voiceb

  }
>>
