\version "2.19.83"

\paper {
    indent = 40
}

tempi = {
    \time 12/8
    
    s1. |
    \new Lyrics \with {
        \override LyricText.self-alignment-X = #LEFT
    } \lyricmode {
        "poco rit."4. -- accel. -- rit.2. -- "A tempo (tempo III)"4.*0
    }
    s1.*1 |
}

notes = {
    \repeat unfold 24 c''8 |
    \break
    \repeat unfold 24 c''8 |
}

\score {
    <<
        \new GrandStaff <<
            \new Dynamics \with {
                \accepts Lyrics
            } \tempi
            \new Staff \with {
                instrumentName = "No K_a_t_engraver"
            } <<
                \notes
            >>
        >>
    >>
}

\score {
    <<
        \new GrandStaff \with {
            \consists Keep_alive_together_engraver
        } <<
            \new Dynamics \with {
                \accepts Lyrics
            } \tempi
            \new Staff = staff \with {
                instrumentName = "K_a_t_engraver (r=80)"
                \override VerticalAxisGroup.remove-layer = #80
            } <<
                \notes
            >>
            \new Staff = staff \with {
                instrumentName = "K_a_t_engraver (r=20)"
                \override VerticalAxisGroup.remove-layer = #20
            } <<
                \notes
            >>
        >>
    >>
}