My WRX has been making a "whish" noise, similar to the turbo spooling up, but I know its not that. Does this in both negative and positive psi. Goes away when the clutch is pushed in. Cannot hear it at idle. I can start to slightly hear it at 20 MPH or so, but I hear it the most at around 60-70 MPH when at a constant speed, and it's really annoying. Again, even at 60-70, when i push the clutch in, the sound goes away immediately. In the log, you'll see where I start to feather the throttle. and that's when you the sound is most pronounced. Anything look off? All systems show as ready in my AP and there are no check engine lights.