%% http://lsr.di.unimi.it/LSR/Item?id=141 \score { \context Voice \relative c { \context Staff << \new Voice { f2 f8 g a b \override Stem.no-stem-extend = ##t f2 f8 g a b } \new Voice { c''2 c8 b a g \override Stem.no-stem-extend = ##t c2 c8 b a g } >> } }