I've been having a few problems with this mod too. One of them is, as mentioned before, the issue with the condensation effects dropping my FPS down to 1-2 (many craft stay around Mach 1 for a while too, meaning a lot of lag). But here's the bigger problem. I don't know if other people had this before or not, but when I changed the condensation and the distortion both to 0 (the distortion effect seemed to make all of my sounds really distorted all the time), nothing changed. I still have condensation and distortion. So then I uninstalled the mod (completely removed the AtmosphericSoundEnhancement folder) and it STILL has condensation effects and distortion. I'm looking at maybe having to reinstall the whole game. Another, less important, issue is that I noticed the shockwave cone when I moved my camera around in one of my spaceplanes once, but I haven't been seeing it with any of my rockets after going above Mach 1. I haven't tried it again recently with a spaceplane, so I'm not sure if other mods may be affecting it, or if my version is broken. EDIT: It seems to have been related to the HotRockets mod. Uninstalling it has fixed the sound issues I was getting. The condensation, however, I guess was part of the stock game, I just never noticed it before I guess I suppose there's nothing I can do about stock game condensation. It's only a bother on rockets with 100+ parts (i.e. only at launch), so it's not worth turning down the atmospheric effects settings.