This turns out to be a quite challenging snippet to engrave.
Here's the first attempt:
\version "2.18"
\partcombine
\relative {\time 2/4 \key aes\major g'16 <bes des>8. ges16 <c ees>8 des16~
| des8 f16 des ees f aes, a |}
\relative {\time 2/4 \key aes\major g'4
\mergeDifferentlyDottedOn \partcombineApart ges8. f16~ | f8 }
As you can see, this preserves the tie, but doesn't start the second measure
with a chord.
Well, let's make it have a chord.
\version "2.18"
\partcombine
\relative {\time 2/4 \key aes\major g'16 <bes des>8. ges16 <c ees>8 des16~
| des8 f16 des ees f aes, a |}
\relative {\time 2/4 \key aes\major g'4
\mergeDifferentlyDottedOn \partcombineApart ges8. f16~ |
\partcombineChords f8 }
Now the tie goes away, and we get a warning message: "Unterminated tie"
The problem is that the partcombiner makes four voices: "one", "two", "shared",
and "solo". So the \partcombineApart music goes into voices "one" and "two",
and the \partcombineChords music goes into voice "shared", and ties don't cross
voices. So that means you will have to create some hidden notes in the voice
"shared", and start the tie from those notes. In this case, it was fine to
have the note heads, but I needed to hide the stem and the flag.
\version "2.18"
<<
\new Voice = "shared" \relative {s4 s8. \once \override Stem.stencil = ##f
\once \override Flag.stencil = ##f <f' des'>16~ |}
\partcombine
\relative {\time 2/4 \key aes\major g'16 <bes des>8. ges16 <c ees>8 des16
| des8 f16 des ees f aes, a |}
\relative {\time 2/4 \key aes\major g'4
\mergeDifferentlyDottedOn \partcombineApart ges8. f16 |
\partcombineChords f8 }
>>
You can read more about using hidden notes to make ties span voices here:
http://lsr.di.unimi.it/LSR/Item?id=8
I hope this helps.
Carl
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