Did you make a live recording or is this an mp3 from another source like a notation file or midi file? I'm not a Sibelius person, but is the problem importing the mp3 audio file or getting the tempos between a live recording and a notation file to sync up? Live audio will probably have a number of tempo fluxuations.
Legacy Forum Post
almost 5 years ago
It is a song off of an album. Just an .mp3 from my itunes.