After a few years of working out the details in order to make this happen... we have audio modding support. Like, real, live, full on modding. This is in it's early stages and I am sure there will be some hiccups. There are some instructions. Check out the setup guide first. You will need to go to audiokinetic.com (Wwise) and create an account and set up a modding project to get a key. You will choose over 200 sounds, non-commercial and notate that it is for a KF2 mod. I am sure there will be questions. I will try to answer them and update documentation as we sort through things. If I don't get back to you immediately, know that I will as soon as I am able. So, get out there and kick the tires on this. Here is a link to a dropbox folder that contains the Wwise project and all the documentation needed.
-Mark Muraski
Audio Director
Tripwire Interactive
-Mark Muraski
Audio Director
Tripwire Interactive