In another thread, Peter said:
Yes, it seems unbelieveable that it is not a half year ago that we had Engine#3 ... which nobody listens to anymore, I'm quite sure.
Before the next version of XXHE is released, I strongly suggest that you switch back to Engine#3 (WASAPI) and take a listen to it (just set Q1=0). If your experience is anything like mine, you won't be able to listen for more than a short time.
It's a great indicator of just how much better KS Adaptive and Special modes are to WASAPI - remember, the Engine that almost all other so-called 'highend' Windows players are using.
Mani.