Here’s a trick: routing music to different voices without using the
Part_combine_iterator. Instead, it uses the same infrastructure as for staff
switching.
\version "2.19.15"
\layout {
\context {
\name "X"
\type "Engraver_group"
}
\context {
\Voice
\accepts "X"
}
}
one = \relative { b'4 b b b }
two = \relative { b'4 b f f }
% TODO: Derive oneChanges and twoChanges from the result of
% determine-split-list.
oneChanges = \relative { }
twoChanges = \relative { s2 \change Voice = "1" }
\score {
<<
\new X << \oneChanges \one >>
\\
\new X << \twoChanges \two >>
>>
}
% Note that if the change commands follow the notes, the changes do
% not happen at the intended moment.
\score {
\new Staff \with { instrumentName = "wrong" } <<
\new X << \one \oneChanges >>
\\
\new X << \two \twoChanges >>
>>
}
—
Dan
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