Cactus Music
Would not a huge factor be that the parts were played to a clock??
I can't see using multi takes of free time drumming without major hair pulling.
Definitely.
I'm actually about to attempt this though on a recording session I did ages ago (actually I've been planning to do this for a looong time but have been trying to get as comfortable with the program as possible before beginning).
It's an albums worth of tunes. All tunes were recorded twice without a click. There are wild tempo variations and one set of tracks is quite a bit faster than the other.
What I want to do is align both versions of each song to the timeline. That way I comp together the best elements of each instrument from both tracks and/or create doubled tracks (like for rhythm guitar) and other wackiness.
What I've come up with is to make slices across all the tracks either at measures or simply at major sections (like at the start/end of verses, choruses, solos, etc).
Then each section of each instrument gets put in it's own take lane (or I can stagger them across two take lanes so nothing overlaps).
Then I would snap the starts of all the splits to where they SHOULD be on the timeline if they had been recorded to a click (I may even toss in some creative tempo changes/fluctuations... just much milder ones than appear on the original recordings).
This will create a scenario where the sections will either overlap or there will be gaps.
If there is an overlap then I time stretch the end of the clips across all tracks so they line up with the start of the next section (which will be right on a beat/measure line and in time). If there is a gap I do the opposite and time stretch it to fill the gap and the end lines up with the start of the next section.
I'd create slight overlapping x fades at each split/section to sew the sections together.
Then I'd bounce any stretched clips to use the offline rendering (and hopefully getting rid of any artifacts).
Then I bounce/flatten everything back into single clips for each instrument.
THEN I could use audiosnap to do any finite time correction on drums (or use the Gonzalez drum correction technique) and the other instruments.
Once everything is back in proper time I can comp together the best parts.
The only REAL problem I see with this plan is the possibility of artifacts but even if I absolutely cannot fully get rid of them on all the tracks as long as the drums and vocals are useable I can just retrack the guits and bass. I'll probably do some drum replacement/reinforcement as well so even that's not a huge deal.
Actually this particular project was what started me on this psychotic obsession to learn as much about Sonar as possible. Kind of complex stuff for a newb so I had to "un-newbify" myself... and I got distracted at certain points by all the other shiny bobbles.
Crazy journey.
Cheers.