\version "2.24.0"

\relative c' {
      \time 3/4
    \tempo \markup {
    \concat {
      (
      \smaller \general-align #Y #DOWN \note {2} #1
      " = "
      \smaller \general-align #Y #DOWN \note {4} #1
      )
    }
  }
  d4^\markup\italic{arco}^\markup\bold{Half as fast}^\markup\bold{Trio} d d
}