Suppress one of two staves

[Helge Kruse]

Hello,

 

I have a harp score where there are a lot of lines that require only the upper staff. How can I suppress the lower staff in lines where it is empty. The following example illustrates this:

 

\version "2.18"

\new PianoStaff <<
  \new Staff \relative c' {
    \repeat unfold 5 { c4 e g c }
    \repeat unfold 12 { c2 a }
    \repeat unfold 20 { R1 }
    \repeat unfold 10 { c2 a }
    \repeat unfold 8 { c,4 e g c }
  }
  \new Staff \relative c {
    \clef bass
    \repeat unfold 5 { c4 e g c }
    \repeat unfold 42 s1
    \repeat unfold 8 { c,4 e g c }
  }
>>

\layout {
  \context {
%    \Staff \RemoveEmptyStaves
  }
}

 

 

Measure 18-48 should have no lower staff. RemoveEmptyStaves unfortunately doesn't work since the rests shall be printed in at least one staff.

 

Regards

Helge