\version "2.15.25"

% Schumann, Op.4, I, 11 last measures

rone = \relative c' {
  \time 3/4
  r4
  \voiceOne
  \change Staff = "LH"
  <a e>8
  \change Staff = "RH"
  <a b> <c a> <d a>
}

lone = \relative c { 
  \voiceTwo
  r4 <c c,>8  <d d,> <e e,> <f f,>
}

\new PianoStaff <<
  \new Staff = "RH" { \rone  }
  \new Staff = "LH" { \clef bass \lone }
>>