Re: time signature and grace note

[Andrew Bernard]

Why don't you try something like this:

melody = \relative c'' {
  <<
    {
      \time 4/4
      \grace {c8} c4 d4 f2
      \time 2/4
      \grace {c8} c4 d4
    }
    \\
    {
      a,4 b c2
      a4 b
    }
  >>
}
\score {\melody}