Any chance you can send one of the session files that gets sluggish to firstname.lastname@example.org ? Even a screenshot of the multitrack session would be useful, as we're tracking similar performance issues with sessions with lots of clips and edits.
I got some small improvement by setting Audition's Processor Priority to High. There's still some lag, but at least the environment is workable.
To set the affinity:
- Press Ctrl-Shift-Esc
- Select the Processes tab
- Right-click on Adobe Audition CS6
- Select Set Priority > High
You'll need to do this each time you open Audition. There are methods of permanently setting the processor priority. However, I am only looking to use this as a work around until the problem is fixed.