Flex editing and bounce in place

[B36arin]

Hey guys. I've searched for this and googled it and I didn't find any solution, so I thought I'd post a thread.

I'm using flex editing(slice mode) in Logic 9 to edit drums on a power metal recording that I'm working on. Seeing as there are 20 drum tracks, I can't edit a whole song before the program starts lagging. The computer is a brand new Mac pro, so it's not the computer that's too slow.

Anyway, my question is, does anybody know of a way to bounce multiple tracks in place at the same time? I want to get rid of the flex markers to boost performance and not kill my workflow, but I haven't found a way to do it yet. I haven't bounced it track by track yet, I'm afraid it might mess with the transient markers seeing as the channels are phase-locked. Does anyone have an easy solution to the problem?

 

[Machinated]

use "merge per track"

if its getting laggy just split the track into several regions (e.g. at each section) and it will get better again. for some reason logic doesnt like having too many transient markers in a single region.