Great explication Malte!
Consider to add it somewhere in the manual in case it is not already there
(if it is, I didn't find it).
Thank you, Gianmaria
On Thu, 4 Apr 2019 at 10:43, Malte Meyn <lilyp...@maltemeyn.de> wrote:
>
>
> Am 04.04.19 um 10:23 schrieb Gianmaria Lari:
> > I don't understand how lilypond manages the stem direction in the
> > following code. Why the difference in the two scores?
>
> \partCombine is for combining a first and a second (or upper and lower)
> part in a score, like flute 1 & flute 2 or soprano & alto. As long as
> the first/upper part has the higher notes, LilyPond will print simple
> chords. When the parts cross (first/upper part has the lower notes),
> this will be shown as two different voices so that the stem directions
> show the non-standard order of voices.
>
> If you want two separate voices in both cases, you can use
> \partCombineApart or instead of \partCombine just << \\ >>.
>
> If you want chords in both cases, you can use \partCombineChords or
> instead of \partCombine just << >> without \\.
>
> %%%%%%%%%%%%%%%%%
> \version "2.21.0"
>
> upper = { c' d' e' f' }
> lower = { a b c' d' }
>
> \partCombine \upper \lower
> \partCombine \lower \upper
> \partCombine { \partCombineApart \upper } \lower
> \partCombine { \partCombineChords \lower } \upper
> << \upper \\ \lower >>
> \new Voice << \upper \lower >>
> %%%%%%%%%%%%%%%%%
>
> N.B. If someone wants to try this at home be aware that in 2.19.83 and
> earlier versions it has to be \partcombine, \partcombineApart,
> \partcombineChords (with lowercase c in “combine”).
>
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