Please have a look at the `divisi-staves.ly' regression test, which is the solution to
https://code.google.com/p/lilypond/issues/detail?id=3518 [Actually, this file contains undocumented features that deserves documentation due to its importance for orchestral music...] I want a variation of this, namely solo violin + gli altri: boring = \set Staff.keepAliveInterfaces = #'() tricky = \unset Staff.keepAliveInterfaces violsolo=\relative d' { \boring \repeat unfold 100 d4 \tricky <d g'>2 \boring \repeat unfold 98 d4 \bar "|." } viol=\relative d' { \boring \repeat unfold 100 d4 \tricky d4 d4 \boring \repeat unfold 98 d4 \bar "|." } \score { \new StaffGroup \with { \consists "Keep_alive_together_engraver" } << \new Staff \with { instrumentName = "Violin solo" shortInstrumentName = "V solo" \override VerticalAxisGroup.remove-empty = ##t \override VerticalAxisGroup.remove-first = ##t \override VerticalAxisGroup.remove-layer = 1 } \violsolo \new Staff \with { instrumentName = "Violin gli altri" shortInstrumentName = "V" \override VerticalAxisGroup.remove-empty = ##t \override VerticalAxisGroup.remove-first = ##t \override VerticalAxisGroup.remove-layer = 1 } \viol \new Staff \with { instrumentName = "Violin" shortInstrumentName = "V" \override VerticalAxisGroup.remove-layer = 2 } << \violsolo \viol >> >> \layout { short-indent = 2\cm indent = 3\cm } } Note the missing `\\' in `<< \violsolo \viol >>'. The attached image shows the result, which is not yet what I would like to have. Now my question: Does lilypond have already a property to make the noteheads merge even if the stems are in the same direction? Or can you advise a better solution? Werner
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