How can I loop a song from a specific point?

I have a song with an intro. I want to play the song once and then loop from a specific point after the intro, for an example 30 seconds in. How can I do this?

You could always use a DAW to edit the track the way you want it. Then import it. For example one full sample of the track followed by a sample starting at 30 seconds repeated. Depends really though how long you want it to play in the scene. The longer the track, the bigger the file size which would be a problem.