I've been trying to use Audio Snap for various things over the last couple years with pretty much no success. At one time I thought I had it working for setting the project tempo based on the original recording and even posted a how-to here about it. The how-to was a long laborious list of things you had to do, most of which required a lot of manual intervention and workarounds, fiddling with markers and manipulating the beat map, etc.
After Platinum was released with the audio snap improvements, I tried it again and it seemed to be even worse at getting the transients correct. I posted here about the issues I was having and was informed that audio snap was not really designed for program material and that Live would be a better solution for warping audio. The responses I got were correct, Live worked perfectly and with no intervention. Fair enough.
Last week I had a mono rhythm guitar track where the sound was perfect but it had a couple minor timing glitches, a little rushing and dragging here and there. I thought ok, now this is something that audio snap should be able to handle and was probably designed for. I was surprised to find that the transient detection was even worse, with around 50% of the transient markers missing the actual transients, sometimes by up to a 16th note. Not wanting to spend hours on the track, I just dragged it into Live, exported the audio, and imported it back into Sonar. Again, Live got it right with no intervention.
The utility of a warping tool is all about being able to bring live audio into a DAW environment and grid the live performance to the project to allow further parts to be added etc. It's pretty rare to want to go the other way and match the project to timing inconsistencies of a live performance.
Audio snap might work perfectly for percussion and drum parts but I've never needed to use it for that since I program all my drum parts. However, I recently tried it with the Amen Break and it had similar problems with that as well.
What are the use cases that Audio Snap works on? The ones that it just gets right?
So far I'm batting 1000 picking the wrong ones.