Hi, folks
I've tried using AudioSnap on a couple of commercial songs I wanted to re-track, but haven't had much success.
Today it was a punk track and it was drifting from 187 - 189 bpm. I found it worked better to get the tempo map track up, and just insert tempo corrections when necessary, like after 4 or 8 bars or so if it was drifting.
Once the drums and maybe a scratch bass line are basically recreated in midi and I have the arrangement blocked out, I'll copy the project and delete the tempo map, running at a consistent tempo.
Just my 0.02, another way to do it.