Hi !
About the latter : KS is
completely different and ... made because of the complaints you have about Engine#3 (WASAPI). It should be "good", but it isn't. Nobody is using it anymore ! (well, that I know of).
You can take the emphasis of Engine#3 away a little by dialing Q1 higher. 14 is usually okay, and nothing much "special" in the mean time. A value of 4 seems to be the minimum for "rather normal", and going more down will make things more or less explicitly digital.
You can set Q2 and Q3 towards 30 (just keep them equal) to add some "warmth", but it is all putting the horse behind the wagon.
About Cue Files : All is made explicitly for that, and I can't guess what problems you ever can have with it. One thing :
Dragging a Cue File (maybe FLAC only) onto the Playlist Area does NOT work. But that is all I can think of;
If you have other problems with it, please give me an example, so we can work that out, okay ?
Thanks,
Peter
PS: What soundcard do you have ?
Also : it may be a good idea to put your data in your signature; this avoids questions like this, and furthermore tomorrow I won't know the answer anymore.