It is automatic at the moment is it not? The sound changes dependent on the terrain surface as far as I know. These are the sort of tweaks that will be made when finalizing the product I should think, but if it's easy enough to alter it may be added soon enough.
I never take much notice with the sound effects yet, as I find them a little annoying, Is it just me who hears the noticeable loop effect when walking? I think the sound effects need a little more attention myself, along with a Rocket launcher
We're all waiting for the day we can launch a rocket into a small scene and watch people fly!
SPECS: Q6600 CPU. Nvidia 260GTX. 8 Gig Memory. Win 7.