Loop intro and shift to the song when ready ...

1 loop file and 1 song file, same tempo.

The loop will play when the band enter the stage.

When the band is ready the drummer will hit a key a couple of bars before start and the song and the band will play.

How do I set this up?
I have tried 2 x Playback plugin with no luck yet.

It is quite easy in Ableton Live but we will like to use MS3 instead ;-)

Regards -Z