I did try \partCombine but it doesn't work for me. I need a more manual
control because of subtle differences between the two voices (e.g. grace
notes and voice-specific ties and slurs). For example, the notes in the
example below are not auto-merged as chords because of these differences.
instrumentOne = {
\time 3/4
\relative c'' { \partial 4 gis4( e'2. dis) c8[ d e \acciaccatura g f g f] }
}
instrumentTwo = {
\time 3/4
\relative c'' { \partial 4 gis4~ gis2. fisis e8[ f g a b a] }
}
<<
\new Staff \partCombine \instrumentOne \instrumentTwo
>>
On Tue, May 24, 2022 at 9:46 PM Jean Abou Samra <j...@abou-samra.fr> wrote:
>
>
> Le 24/05/2022 à 14:43, Jean Abou Samra a écrit :
> > Le 24/05/2022 à 13:36, Soo Lee a écrit :
> >> I isolated these notes to create a tiny example, but the context
> >> suggests that it makes more sense to view them as two voices. This is
> >> a Chopin piece and unlike e.g. Bach, two voices often are expressed
> >> like a chord. I wanted to avoid going back and forth between one
> >> voice and two voices too often.
> >> I guess it is possible to just use a chord in this case. I'll try to
> >> think about other work-arounds. However, I think an ideal behavior
> >> would still be to automatically rearrange the note head direction in
> >> a case like this.
> >
> >
> >
> > I don't think this syntax is the right tool for your
> > purpose. With \new Voice, you're telling LilyPond that
> > you want separate voices. With \voiceOne and \voiceTwo,
> > you specify stem directions for both voices. Then, with
> > \stemUp, you kind of contradict what you just said. It's
> > tricky for LilyPond to interpret this input. Rather, I
> > suspect you want to use the part combining feature in
> > order to merge notes in one single stem when the rhythm
> > is the same.
> >
> >
> https://lilypond.org/doc/v2.22/Documentation/notation/multiple-voices.html#automatic-part-combining
> >
> >
> > Jean
> >
>
>
> To expand: consider
>
> \version "2.22.2"
>
> \new Staff <<
> \new Voice { \voiceOne g''8 8 8 8 }
> \new Voice { \voiceTwo \once \stemUp a,8 a'8 \once \stemUp a,8 a'8 }
> >>
>
>
> If the \stemUp made the stems merge, this use case would no longer work.
>
> Jean
>
>
