Ringing from engine bay, goes away when a/c comes on
 

The title is a little vague I know, but I have a 2002 Oldsmobile Intrigue that makes a ringing noise on start up and while the engine is running.

Here's what it sounds like:
Engine Ringing.mp3

As always your help is appreciated.

your AC clutch needs to be adjusted

Take a look here. https://www.gmforum.com/mechanical-134/adjust-ac-clutch-plate-278951/