\version "2.18.2"
\relative c'
{
  \new Staff
  {
    \omit Staff.TimeSignature
    \clef "soprano"
    <<
      {
	\stemUp a'4
	%% \once \hideNotes
	a
	%% \once \hideNotes
	a g
      }
      \bar "||"
      \new Voice
      {
	\voiceTwo \stemDown
	f4 \set fontSize = #-4
	%% \single \hide Stem
	e
	%% \single \hide Stem
	d2*1/2 %%
	^\markup {
	  \combine \arrow-head #Y #DOWN ##f \draw-line #'( 0 . 2)
	}
	\unset fontSize
	c4 %%
	|
      }
    >>
    <<
      {
	\time 5/4
	\stemUp c'
	%% \once \hideNotes
	c
	%% \once \hideNotes
	c
	%% \once \hideNotes
	c d
      }
      \bar "||"
      \new Voice
      {
	\voiceTwo \stemDown c, \set fontSize = #-4
	%% \single  \hide Stem
	d
	%% \single \hide Stem
	e
	%% \single \hide Stem
	f2*1/2 %%
	^\markup {
	  \combine \arrow-head #Y #DOWN ##f \draw-line #'( 0 . 2)
	}
	\unset fontSize  g4 |
      }
    >>
    <<
      {
	\time 4/4 %%
	\stemUp c
	%% \set fontSize = #-4
	%% \single \hide Stem
	b
%^\markup { \combine \arrow-head #Y #DOWN ##f \draw-line #'( 0 . 2) }
	%% \single \hide Stem
	a \unset fontSize  g } \bar "||"
      \new Voice
      {
	\voiceTwo \stemDown
	{
	  e4 \set fontSize = #-4
	  %% \once \hideNotes
	  d2*1/2 %%
	  ^\markup {
	    \combine \arrow-head #Y #DOWN ##f \draw-line #'( 0 . 2)
	  }
	  %% \once \hideNotes
	  d4 %%
	  \unset fontSize c
	}
	|
      }
    >>
    \bar "||"
  }
}