The ATI sound is optical HD out on the video card and is not in use.
The onboard sound is the one in use, Realtek ALC889A, with latest drivers, did it on the previous drivers also.
No custom sounds and the mic is muted, only makes wierd sounds when in tower or hanger, as soon as I start engine wierd sounds go away, as soon as I return to tower or hanger they come back.
Unplugging the mic has solved the problem.