I've installed X3cP with X1P installed.  My aud.ini had the following line carried over (I remarked it to record that it was a manual change I'd made):
 
;Changed following value from 1 to 2 per hint for multicore on forum.
ThreadSchedulingModel=2
 
I'm running Win7 x 64 with the following processor:
2.67 gigahertz Intel Core i7 920
Multi-core (4 total)
Hyper-threaded (8 total)
 
Any informed opinion as to the optimal setting for that parameter in X3?  I've been getting X3c crashes just looking at new features (on an X1 project).  By no means blaming the software, just need to optimize configuration.  Would rather try single mods before permitting X3 to simply generate a new aud.ini.  Or is it no big deal to allow it to do so?
 
Thx, Ron

I would just copy your existing aud.ini to a separate folder and allow X3 to generate a new one.  That way you can directly compare the two if needed.
 

Agreed. Online help f1 should be of help as well. And please disable 64 bit precision engine until X3D arrives.