Re: ties and polyphony

[Xavier Scheuer]

On 26 October 2011 23:06, J. Boor <address@hidden> wrote:
> In this file:
>
> http://www.jboor.net/music/polyreel/poly.ly
>
> a second voice begins in the second measure.
>
> I would like there to be a tie between the last E in the first measure and
> the first e4 in the second measure. The only way that I have
> been able to do this is by beginning the polyphony earlier
> and using a skip at the beginning of the second voice.
>
> Is there a better way to do this? The piece doesn't really
> have two voices through out, so I don't want to litter my
> score with rests.

You can instanciate explicitly the voices, see explanations in
NR 1.5.2 Multiple voices > Single-staff polyphony > Explicitly
instantiating voices
http://lilypond.org/doc/v2.15/Documentation/notation/multiple-voices.html#single_002dstaff-polyphony

See below how it can be done.
Actually there is an enhancement request to improve << \\ >> so it
could handle these cases better.  It is tracked as issue #1316 .
http://code.google.com/p/lilypond/issues/detail?id=1316

%%%% Snippet

\version "2.14.2"

global = {
  \key d \major
}

\score {
  <<
    \new Staff = "mandolin" \with {
      instrumentName = "Mandolin"
    } {
      \new Voice = "mandolin" {
        \relative c' {
          \global
          d8[ fis] a[ g,] d''[ d,] fis'[ e~]
          <<
            {
              %% this is the continuation of main "mandolin" voice
              %% stems, slurs, etc. UP
              \voiceOne
              e4 fis16[ g fis8] e[ d] c[ a]
            }
            \new Voice = "mandolinTwo" {
              %% stems, slurs, etc. DOWN
              \voiceTwo

              g,8[ d'] b2.  % there was a typo here (I added 'b')!
            }
          >>
          \oneVoice
          %% stems, slurs, etc. back to normal: NEUTRAL
          %% continuation of main "mandolin" voice
          %% etc.
        }
      }
    }
  >>
  \layout {
  }
}

%%%% End of snippet

Cheers,
Xavier

-- 
Xavier Scheuer <address@hidden>