Re: Switching between two- and three-staves piano score

[Thomas Ruedas]

On Monday 26 February 2007 21:48, Rune Zedeler wrote:
> > I'm trying to typeset a piece for solo piano where temporarily a third
> > staff is needed.
> http://mutopiaproject.org/cgibin/piece-info.cgi?id=314
Thanks Rune, I see that basically you defined a third staff throughout and 
made it disappear somewhere in between where it was empty, although with 
the rather limited knowledge I have of Lilypond I don't quite get how you 
did it.
Anyway, I come closer to the goal now after I discovered the 
\RemoveEmptyStaffContext thing (see manual 
http://lilypond.org/doc/v2.6/Documentation/user/lilypond.html#Hiding-staves).
However, one thing is still odd, namely the appearance of the empty third 
staff at the beginning of the piece, where it is not supposed to be there 
(it should appear first only several bars into the piece). Now I have
iii = \context Staff {
        \context Voice = "iii"
        \voiceThree
\override Staff.TimeSignature #'style = #'()
\clef bass \key bes \major \time 6/8
s8 s2.*79
r4. r4 #(set-octavation -1) <a,, a,>8 }
\score {
  \context PianoStaff <<
    \context Staff=upper <<
      \i
    >>
    \context Staff=lower <<
      \ii
    >>
    \context Staff=bass <<
      \iii
    >>
  >>
  \layout {
    \context { \RemoveEmptyStaffContext }
}

So, how do I get rid of that empty staff at the beginning?
Thomas
-- 
Thomas Ruedas
Department of Terrestrial Magnetism
Carnegie Institution of Washington
http://www.dtm.ciw.edu/ruedas/