Re: Quantizing audio tracks.
No it's not really possible to do this as easily as you can with midi.
Editing audio is always going to be much more complex and there is always a danger of trashing the quality with all that number crunching involved.
About all you can do is go in and make splits and move the resulting clips into line. This is not easy if the parts are dense and busy. I do this occasionally when a chord misses a stop. Lead solo's??? forget it. Much faster to just keep playing over and over and comp the tracks together.