One thing you could do is split up the parts to be combined into homophonic and polyphonic sections. Depending on the situation, this may be more work than it's worth, but here's an example below.
Hope this helps. - Mark * * * * * * * * * * \version "2.12.3" global = { \time 3/4 } OrganRHOne = { g'2. g' } OrganRHTwo = { e'2. e'} OrganLHThree = { c2. c } % polyphonic part OrganLHOneA = { c'2. } OrganLHTwoA = { g4 g g } % homophonic part OrganLHOneB = { c'4 c' c' } OrganLHTwoB = { g4 g g } \new PianoStaff << \context Staff = upper << \context Voice = OrganRHi { \global \voiceOne \OrganRHOne } \context Voice = OrganRHii { \global \voiceTwo \OrganRHTwo } >> \context Staff = lower << \clef bass { % start upstems % polyphonic part << \context Voice = OrganLHi { \global \voiceOne \OrganLHOneA } \context Voice = OrganLHii { \global \voiceThree \OrganLHTwoA } >> % homophonic part \context Voice = OrganLHi << \voiceOne \OrganLHOneB \OrganLHTwoB >> } % end upstems \context Voice = Pedals { \global \voiceTwo \OrganLHThree } >> >> _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org http://lists.gnu.org/mailman/listinfo/lilypond-user