omit time signature when time doesn't change

[Carlo Vanoni]

Hi everyone!

I have a score with some time changes. I'm using variables for the various song section. Each section has it's own time (more useful than declaring it each time there is a time change). What happens is that the time signature will be printed any time it is declared, even when no time changes occurs. Here is a simple example:

%%%%%%%%%%%%%%%%%

\version "2.18.0"

verse = { \time 4/4 c2 c2 | c2 c2 | }
verseFirstEnd = { \time 4/4 d2 d2 | }
verseSecondEnd = { \time 2/4 c2 | }

song = {
    \new Staff
    {
        \relative c'
        {
            \verse  % First measure; print time signature, of course
            \verseFirstEnd  % Same time; I don't wont time signature printed
            \verse  % Same time; I don't wont time signature printed
            \verseSecondEnd  % Time change; print the new time signature
            \verse  % Time change; print the new time signature
        }
    }
}

\score {   
  \song
}

%%%%%%%%%%%%%%%%%

I suppose (didn't tried yet) that I can use the an "omit" command (or similar) to omit it locally, but it is not very useful to operate this way (is just like declaring the time outside the variables when needed).

Is there any command that says "omit all time signature when there is no time changes"?

Thanks!

MIX