Well, despite that I think this is an absolutely terrible hack, exporting to midi and importing it back produces more or less what you want, with a lot of editing. Works on 2.19.41 on openSUSE Leap 42.1 linux.
Still interested to know why you want to do this. Andrew == snip Using your input: \version "2.14.0" \layout { \context { \Voice \remove "Note_heads_engraver" \consists "Completion_heads_engraver" \remove "Rest_engraver" \consists "Completion_rest_engraver" } } trackAchannelA = { % [TEXT_EVENT] creator: % [TEXT_EVENT] GNU LilyPond 2.19.41 \time 4/4 \tempo 4 = 60 } trackA = << \context Voice = voiceA \trackAchannelA >> trackBchannelA = { \set Staff.instrumentName = "\new:" } trackBchannelB = \relative c { a'4 b c, d | % 2 a' b c, d | % 3 a' b c, d | % 4 a' b c, d | % 5 e f g a | % 6 a b c, d | % 7 e f g a | % 8 } trackB = << \clef bass \context Voice = voiceA \trackBchannelA \context Voice = voiceB \trackBchannelB >> \score { << \context Staff=trackB \trackA \context Staff=trackB \trackB >> \layout {} \midi {} } _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user