\version "2.19.82"
\include "mark-line.ily"

\layout {
  \context {
    \Score
    \remove "Timing_translator"
    \remove "Default_bar_line_engraver"
    \remove "Repeat_acknowledge_engraver"
  }
  \context {
    \name TimingGroup
    \type "Engraver_group"
    \alias StaffGroup

    \consists "Timing_translator"
    \consists "Default_bar_line_engraver"
    \consists "Repeat_acknowledge_engraver"

    \defaultchild "Staff"

    %\accepts "ChoirStaff"
    %\accepts "ChordNames"
    %\accepts "DrumStaff"
    %\accepts "FiguredBass"
    %\accepts "FretBoards"
    %\accepts "GrandStaff"
    %\accepts "Lyrics"
    \accepts "MarkLine"
    %\accepts "OneStaff"
    %\accepts "PianoStaff"
    %\accepts "RhythmicStaff"
    \accepts "Staff"
    %\accepts "StaffGroup"
    %\accepts "TabStaff"
  }
  \inherit-acceptability "TimingGroup" "StaffGroup"
}

timingOne = {
  \time 3/4
  s2.*2
}
marksOne = {
  \tempo 4 = 90
}
musicOne = \context Bottom <<
  \timingOne
  \fixed c' {
    c4 c c
    \repeat volta 2 { c c c }
  }
>>

timingTwo = {
  \time 2/4
  \set Timing.measureLength = #(ly:make-moment 3/8)
  s4.*2
  \repeat volta 2 { s4.*2 }
}
marksTwo = {
  \tempo 4 = 120
}
musicTwo = \context Bottom <<
  \timingOne
  \scaleDurations 3/4
  \fixed c' {
    c4 c
    c c
    \repeat volta 2 {
      c c
      c c
    }
  }
>>

<<
  \new TimingGroup <<
    \new MarkLine \marksOne
    \new Staff \musicOne
  >>
  \new TimingGroup <<
    \new MarkLine \marksTwo
    \new Staff \musicTwo
    \new Staff \musicTwo
  >>
>>