Just export separate audio files of what you need….
Work on those files and then place those back in your timeline.
Mute your original files. Keep them their as reference….
I finally bought PowerPoint for my MAC.
KeyNote is much better but most of my clients use PowerPoint
and want all of their funky transitions and builds like they
built them in PP.
So I use SnapZ Pro to capture the screen playback from PP.
With my luck I would spend $3000 and get geared up
and then – Apple would release a Blu-Ray upgrade for $300.
If they don’t then I will send the clients to you.