Mats Bengtsson writes:
[...]
> However, a simpler solution is to avoid to keep the original
> Voice context for the upper music line when the music splits
> into two voices. This is easiest done by not using the
> <<{...} \\ {...}>> feature (untested):
> \score{
> <<
> \context Voice = "melody" {
> \relative c' { c
> << {\voiceOne c8 e} \context Voice = splitpart {\voiceTwo c4} >>
> \oneVoice c4 c | c
> }
> }
> \new Lyrics \lyricsto "melody" { we shall not o- ver- come }
> \new Lyrics \lyricsto "splitpart" { shall }
> >>
> }
>
Oh I *see*! I wasn't aware that you can simply switch contexts while
remaining on the current staff. Thank you very much, that was exactly
what I needed.