The important thing in putting the "BASE" song into BB in order to create accompaniment..... is to get BB/RB to recognize where the song begins..... measure 1 beat 1 so that it can build from there.

Without that very important "mile marker" things will not sync properly when you start to build the tracks in BB or RB.

That one issue has been the hardest part for me..... often taking several attempts to get it right. It is critical to get it exactly right. Then.... once that is done, the rest, as they say, is all "down hill".....
You can find my music at:

Add nothing that adds nothing to the music.

As the sword chooses the warrior, so too, the song chooses the writer.