Staff / System problem

[Ralph Palmer]

Greetings -

I'm running LilyPond 2.12.3 under Ubuntu.

I'm 
trying to duplicate the staff / system setup shown in the attached 
Duet.jpg. The ossia staff begins on the second line, and has dashed bar 
spanners. The closest I've been able to come so far is similar to what I have in test-1.ly (a minimal example) and test-1.jpg. Basically, I have the music in A, B, and C, and then do:


\score {
    \new StaffGroup <<
       \new Staff << \A >>
       \new Staff << \B >>
       \new Staff << \C >>
  >>  
}

Here's the full test-1.ly file:



%%%%%%%%%% begin snippet %%%%%%%%%%%

% test-1

\version "2.12.3"


\paper {
  ragged-last-bottom = ##t
  ragged-right = ##f
}

\layout {
  \context {
    \RemoveEmptyStaffContext



  }
}

A =
\relative c'' {
  \key c \major
  \clef treble
  \time 4/4

  a b c d |
  b c d e |
  c d e f |
  d e f g |
  a g f e |
  g f e d |
  f e d c |
  e d c b |



  d c b a |
  a b c d |
  b c d e |
  \bar "|."

}

B =
\relative c'' {
  \key c \major
  \clef treble
  \time 4/4

  e f g a |
  b a g f |
  f g a b |
  a g f e |



  d e f g |
  f e d c |
  b e f g |
  f e d c |
  b c d e |
  f g a a |
  g f e d |

}

C =
\relative c'' {
  \key c \major
  \time 4/4

  s1 |
  s1 |
  s1 |


  s1 |
  s1 |
  a4 a b b |
  c c d d |
  b b a a |
  d d c c |
  b a b a |
  c d c d |
}

\score {
  \new StaffGroup <<
    \new Staff << \A >>
    \new Staff << \B >>



    \new Staff \with {
      fontSize = #-3
      \override StaffSymbol #'staff-space = #(magstep -3)
      \remove "Time_signature_engraver"
    } << \C 
%      \override Score.SpanBar #'glyph-name = #"dashed"



       >>
  >>

  \layout {
    \context {
      \RemoveEmptyStaffContext
    }
  }
  \midi { }
}

%%%%%%%%%%%% end snippet %%%%%%%%%%%

Using
 spacers for the empty measures in C and then using 
\RemoveEmptyStaffContext did not work, because the empty staff is in the
 first system.

I also tried putting a new StaffGroup into B, with two \new Staff 
units as parallel music, but LilyPond put all the succeeding notes in B 
as simultaneous.

Can anyone help me with either an appropriate 
score structure or a command to override the \RemoveEmptyStaffContext 
default so I can remove the empty staff in the first system? I'd also 
like the solid bar spanners in the top staff group and dashed bar 
spanners between the middle staff and the ossia staff.

I appreciate your time and attention,

Pondly,

Ralph

-- 
Ralph Palmer
Montague City, MA
USA
address@hidden

test-1.jpg
Description: JPEG image

Duet.jpg
Description: JPEG image