Re: Scoring song with multiple sections

[Malte Meyn]

Am 01.05.2016 um 17:29 schrieb Henry Law:
> But on the second appearance of "<<" Lily barfs with "syntax error,
> unexpected <<".

Every \score can contain only one music expression but you did something 
like

%%%%%
\version "2.18.2"
\score {
  <<
    \new Staff a
    \new Staff b
  >>
  <<
    f
    g
  >>
}
%%%%%

This is two music expressions, each in << >> so the second expression 
starting with << is unexpected.

There are two possibilities how to solve your problem:
1. Use only one << >> expression and put the music into {}:

%%%%%
\version "2.18.2"
\score {
  <<
    \new Staff { a f }
    \new Staff { b g }
  >>
}
%%%%%

2. Put the << >> << >> inside { } (so it’s one sequential music 
expression). Then you have to reuse the (named) staves using \context 
otherwise new staves will be created:

%%%%%
\version "2.18.2"
\score {
  {
    <<
      \new Staff = "first" a
      \new Staff = "second" b
    >>
    <<
      \context Staff = "first" f
      \context Staff = "second" g
    >>
  }
}
%%%%%

It’s the same for ChordNames and Lyrics (but you probably cannot use 
\addlyrics as a shortcut for \new Lyrics \lyricsto … because you have to 
name the Lyrics context).